This document discusses multiple sequence alignment tools. It describes how multiple sequence alignments (MSAs) are used to identify conserved regions across related sequences and determine consensus sequences. The document outlines different types of MSA, including progressive and iterative methods. It also describes the steps to perform a multiple sequence alignment using COBALT at NCBI, including uploading sequences, running the alignment, and editing results. The progressive method is noted as the most widely used due to its speed and accuracy, though it may not produce globally optimal alignments.
Clustal omega is a widely used bioinformatics tool for performing multiple sequence alignment. This ppt contains the concept and types of sequence alignment, algorithms followed by clustal omega, its result interpretation and applications.
Lecture delivered by T. Ashok Kumar, Head, Department of Bioinformatics, Noorul Islam College of Arts and Science, Kumaracoil, Thuckalay, INDIA. UGC Sponsored National Workshop on BIOINFORMATICS AND GENOME ANALYSIS for College Teachers on August 11 & 12, 2014. Organized by Centre for Bioinformatics, Department of Zoology, NMCC.
Clustal omega is a widely used bioinformatics tool for performing multiple sequence alignment. This ppt contains the concept and types of sequence alignment, algorithms followed by clustal omega, its result interpretation and applications.
Lecture delivered by T. Ashok Kumar, Head, Department of Bioinformatics, Noorul Islam College of Arts and Science, Kumaracoil, Thuckalay, INDIA. UGC Sponsored National Workshop on BIOINFORMATICS AND GENOME ANALYSIS for College Teachers on August 11 & 12, 2014. Organized by Centre for Bioinformatics, Department of Zoology, NMCC.
Sequence homology search and multiple sequence alignment(1)AnkitTiwari354
Sequence homology is the biological homology between DNA, RNA, or protein sequences, defined in terms of shared ancestry in the evolutionary history of life. Two segments of DNA can have shared ancestry because of three phenomena: either a speciation event (orthologs), or a duplication event (paralogs), or else a horizontal (or lateral) gene transfer event (xenologs).[1]
Homology among DNA, RNA, or proteins is typically inferred from their nucleotide or amino acid sequence similarity. Significant similarity is strong evidence that two sequences are related by evolutionary changes from a common ancestral sequence. Alignments of multiple sequences are used to indicate which regions of each sequence are homologous.
In bioinformatics, a sequence alignment is a way of arranging the sequences of DNA, RNA, or protein to identify regions of similarity that may be a consequence of functional, structural, or evolutionary relationships between the sequences.
The following slides were prepared by POORNIMA M.S student of II M.Sc., Life Science Bangalore University, Bangalore
Secondary Structure Prediction of proteins Vijay Hemmadi
Secondary structure prediction has been around for almost a quarter of a century. The early methods suffered from a lack of data. Predictions were performed on single sequences rather than families of homologous sequences, and there were relatively few known 3D structures from which to derive parameters. Probably the most famous early methods are those of Chou & Fasman, Garnier, Osguthorbe & Robson (GOR) and Lim. Although the authors originally claimed quite high accuracies (70-80 %), under careful examination, the methods were shown to be only between 56 and 60% accurate (see Kabsch & Sander, 1984 given below). An early problem in secondary structure prediction had been the inclusion of structures used to derive parameters in the set of structures used to assess the accuracy of the method.
Some good references on the subject:
Global and local alignment (bioinformatics)Pritom Chaki
A general global alignment technique is the Needleman–Wunsch algorithm, which is based on dynamic programming. Local alignments are more useful for dissimilar sequences that are suspected to contain regions of similarity or similar sequence motifs within their larger sequence context.
Scoring system is a set of values for qualifying the set of one residue being substituted by another in an alignment.
It is also known as substitution matrix.
Scoring matrix of nucleotide is relatively simple.
A positive value or a high score is given for a match & negative value or a low score is given for a mismatch.
Scoring matrices for amino acids are more complicated because scoring has to reflect the physicochemical properties of amino acid residues.
protein structure prediction methods. homology modelling, fold recognition, threading, ab initio methods. in short and easy form slides. after one time read you can easily understand methods for protein structure prediction.
OpenACC and Hackathons Monthly Highlights: April 2023OpenACC
Stay up-to-date on the latest news, research and resources. This month's edition covers the Open Hackathon Mentor Program, highlight from the recent UK National Hackathon, upcoming Open Hackathon and Bootcamp events, and more!
GPCODON ALIGNMENT: A GLOBAL PAIRWISE CODON BASED SEQUENCE ALIGNMENT APPROACHijdms
The alignment of two DNA sequences is a basic step in the analysis of biological data. Sequencing a long
DNA sequence is one of the most interesting problems in bioinformatics. Several techniques have been
developed to solve this sequence alignment problem like dynamic programming and heuristic algorithms.
In this paper, we introduce (GPCodon alignment) a pairwise DNA-DNA method for global sequence
alignment that improves the accuracy of pairwise sequence alignment. We use a new scoring matrix to
produce the final alignment called the empirical codon substitution matrix. Using this matrix in our
technique enabled the discovery of new relationships between sequences that could not be discovered using
traditional matrices. In addition, we present experimental results that show the performance of the
proposed technique over eleven datasets of average length of 2967 bps. We compared the efficiency and
accuracy of our techniques against a comparable tool called “Pairwise Align Codons” [1].
Sequence homology search and multiple sequence alignment(1)AnkitTiwari354
Sequence homology is the biological homology between DNA, RNA, or protein sequences, defined in terms of shared ancestry in the evolutionary history of life. Two segments of DNA can have shared ancestry because of three phenomena: either a speciation event (orthologs), or a duplication event (paralogs), or else a horizontal (or lateral) gene transfer event (xenologs).[1]
Homology among DNA, RNA, or proteins is typically inferred from their nucleotide or amino acid sequence similarity. Significant similarity is strong evidence that two sequences are related by evolutionary changes from a common ancestral sequence. Alignments of multiple sequences are used to indicate which regions of each sequence are homologous.
In bioinformatics, a sequence alignment is a way of arranging the sequences of DNA, RNA, or protein to identify regions of similarity that may be a consequence of functional, structural, or evolutionary relationships between the sequences.
The following slides were prepared by POORNIMA M.S student of II M.Sc., Life Science Bangalore University, Bangalore
Secondary Structure Prediction of proteins Vijay Hemmadi
Secondary structure prediction has been around for almost a quarter of a century. The early methods suffered from a lack of data. Predictions were performed on single sequences rather than families of homologous sequences, and there were relatively few known 3D structures from which to derive parameters. Probably the most famous early methods are those of Chou & Fasman, Garnier, Osguthorbe & Robson (GOR) and Lim. Although the authors originally claimed quite high accuracies (70-80 %), under careful examination, the methods were shown to be only between 56 and 60% accurate (see Kabsch & Sander, 1984 given below). An early problem in secondary structure prediction had been the inclusion of structures used to derive parameters in the set of structures used to assess the accuracy of the method.
Some good references on the subject:
Global and local alignment (bioinformatics)Pritom Chaki
A general global alignment technique is the Needleman–Wunsch algorithm, which is based on dynamic programming. Local alignments are more useful for dissimilar sequences that are suspected to contain regions of similarity or similar sequence motifs within their larger sequence context.
Scoring system is a set of values for qualifying the set of one residue being substituted by another in an alignment.
It is also known as substitution matrix.
Scoring matrix of nucleotide is relatively simple.
A positive value or a high score is given for a match & negative value or a low score is given for a mismatch.
Scoring matrices for amino acids are more complicated because scoring has to reflect the physicochemical properties of amino acid residues.
protein structure prediction methods. homology modelling, fold recognition, threading, ab initio methods. in short and easy form slides. after one time read you can easily understand methods for protein structure prediction.
OpenACC and Hackathons Monthly Highlights: April 2023OpenACC
Stay up-to-date on the latest news, research and resources. This month's edition covers the Open Hackathon Mentor Program, highlight from the recent UK National Hackathon, upcoming Open Hackathon and Bootcamp events, and more!
GPCODON ALIGNMENT: A GLOBAL PAIRWISE CODON BASED SEQUENCE ALIGNMENT APPROACHijdms
The alignment of two DNA sequences is a basic step in the analysis of biological data. Sequencing a long
DNA sequence is one of the most interesting problems in bioinformatics. Several techniques have been
developed to solve this sequence alignment problem like dynamic programming and heuristic algorithms.
In this paper, we introduce (GPCodon alignment) a pairwise DNA-DNA method for global sequence
alignment that improves the accuracy of pairwise sequence alignment. We use a new scoring matrix to
produce the final alignment called the empirical codon substitution matrix. Using this matrix in our
technique enabled the discovery of new relationships between sequences that could not be discovered using
traditional matrices. In addition, we present experimental results that show the performance of the
proposed technique over eleven datasets of average length of 2967 bps. We compared the efficiency and
accuracy of our techniques against a comparable tool called “Pairwise Align Codons” [1].
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
An Efficient Approach for Requirement Traceability Integrated With Software R...IOSR Journals
Abstract: Traceability links between requirements of a system and its source code are helpful in reducing
system conception effort. During software updates and maintenance, the traceability links become invalid since
the developers may modify or remove some features of the source code. Hence, to acquire trustable links from a
system source code, a supervised link tracing approach is proposed here. In proposed approach, IR techniques
are applied on source code and requirements document to generate baseline traceability links. Concurrently,
software repositories are also mined to generate validating traceability links i.e. Histrace links which are then
called as experts. Now a trust model named as DynWing is used to rank the different types of experts. DynWing
dynamically assigns weights to different types of experts in ranking process. The top ranked experts are then fed
to the trust model named as Trumo. Trumo validates the baseline links with top ranked experts and finds the
trustable links from baseline links set. While validating the links, Trumo is capable of discarding or re-ranking
the experts and finds most traceable links. The proposed approach is able to improve the precision and recall
values of the traceability links.
Index Terms: Traceability, requirements, features, source code, repositories, experts.
A Study on Replication and Failover Cluster to Maximize System UptimeYogeshIJTSRD
Different types of clients over the globe uses Cloud services because cloud computing involves various features and advantages such as building cost effectives solutions for business, scale resources up and down according to the current demand and many more. But from the cloud provider point of view, there are many challenges that need to be faced in order to ensure a hassle free service delivery to the clients. One such problem is to maintain high availability of services. This project aims at presenting a high available HA solution for business continuity and disaster recovery through configuration of various other services such as load balancing, elasticity and replication. Miss Pratiksha Bhagawati | Mrs. Priya N "A Study on Replication and Failover Cluster to Maximize System Uptime" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-4 , June 2021, URL: https://www.ijtsrd.compapers/ijtsrd41249.pdf Paper URL: https://www.ijtsrd.comcomputer-science/other/41249/a-study-on-replication-and-failover-cluster-to-maximize-system-uptime/miss-pratiksha-bhagawati
Efficient failure detection and consensus at extreme-scale systemsIJECEIAES
Distributed systems and extreme-scale systems are ubiquitous in recent years and have seen throughout academia organizations, business, home, and government sectors. Peer-to-peer (P2P) technology is a typical distributed system model that is gaining popularity for delivering computing resources and services. Distributed systems try to increase its availability in the event of frequent component failures and functioning the system in such scenario is notoriously difficult. In order to identify component failures in the system and achieve global agreement (consensus) among failed components, this paper implemented an efficient failure detection and consensus algorithm based on fail-stop type process failures. The proposed algorithm is fault-tolerant to process failures occurring before and during the execution of the algorithm. The proposed algorithm works with the epidemic gossip protocol, which is a randomly generated paradigm of computation and communication that is both fault-tolerant and scalable. A simulation of an extreme-scale information dissemination process shows that global agreement can be achieved. A P2P simulator, PeerSim, is used in the paper to implement and test the proposed algorithm. The proposed algorithm results exhibited high scalability and at the same time detected all the process failures. The status of all the processes is maintained in a Boolean matrix.
CIS 532 Network Architecture and AnalysisStudent’s NameSubm.docxsleeperharwell
CIS 532: Network Architecture and Analysis
Student’s Name
Submitted To
Strayer University
14th May 2016
1. Design a plan to integrate the different routing protocols into a new network design for Genome4U’s lab.
Since for every team, a different project has been assigned, the setup of a separate VLAN should also be provided. This can serve as a logical separation between each of the teams, assuming to tackle different environments. In the figure which has been provided above, the CISCO switches indicate several VLANs that have already been configured. These VLANs have been connected using routers, the EIGRP routing protocol on which has been configured. In general, the router, i.e. EIGRP is internal to the lab. The diagram has two routers, i.e., Router- EIGRP/RIP which is meant to connect the lab of biology and Router-EIGRP/OSPF which connects the lab o fundraising interface. The use of file servers is made to store files containing the data of volunteer (NAS – Network attached storage).
Due to the difference of routing schemes in the research lab, Fund raising lab and Biology lab respectively, one needs to adopt immediately the process of route redistribution (CISCO, 2012). Between the lab of Biology and research, the existing in-between router is responsible for redistribution between EIGRP and RIP network whereas, the responsibility of router located between that of the fund raising office and research is related to EIGRP/OSPF redistribution. Apart from the router placed between that of the lab o biology and fund raising office tends to tackle OSPF and RIP networks for redistribution of routes between them.
2. What information will you redistribute between routing protocols?
The importance of route redistribution lies in the fact that it helps to deal with the diversity present within any of the networks, especially concerning routing. Routing protocols are needed to make the network devices remember routes. However in case of presence of different protocol on different network segments, the importance of redistribution route emerges. To understand this, one can consider the example of redistribution where the RIP learned routes are attempted to be made understandable to that of EIGRP and vice versa. The use of default metric or related techniques are brought into use to do this (CISCO, 2012).
3. Identify the problems you expect to encounter (with different metrics, security, etc.) when you redistribute.
Each of the routing protocols uses different metrics in the response of having completed with deciding the best possible path. Entries as per the metric are also mentioned in the routing tables. The best example to that may be EIGRP under which the use of delay is made. Other than that, bandwidth and RIP also use a simple metric of hop counts. However, the use of the standard default metric is made to assure route distribution. It is even possible to define on the basis of redistribution, any specific metric.
Another potential prob.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
3. SEQUENCE ALIGNMENT
In bioinformatics, a sequence alignments a way of arranging the sequences of DNA, RNA
, or protein to identify regions of similarity that may be a consequence of functional, stru
ctural, or evolutionary relationships between the sequences.
2/22/2018
3
4. SEQUENCE ALIGNMENT
SEQUENCE ALIGNMENT Sequences often contain highly conserved regions
These regions can be used for initial alignments
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6. MULTIPLE SEQUENCE ALIGNMENT
A multiple sequence alignment is tool that simultaneously aligns multiple protein
sequences, automatically utilizes information about protein domains, and has a good
compromise between speed and accuracy will have practical advantages over
current tools
The principle is that multiple alignments are achieved by successive application of p
airwise methods.
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7. PURPOSE OF MSA
In order to characterize protein families, identify shared regions of homology in a
multiple sequence alignment
Determination of the consensus sequence of several aligned sequences.
Consensus sequences can help to develop a sequence “finger print” which allo
ws the identification of members of distantly related protein family (motifs)
MSA can help us to reveal biological facts
about proteins, like analysis of the secondary/tertiary structure
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9. TYPES OF MSA
Dynamic programming approach
Computes an optimal alignment for a given score function. Because of its high ru
nning time , it is not typically used in practice.
Progressive method
This approach repeatedly aligns two sequences, two alignments, or a sequence
with an alignment.
Iterative method
Works similarly to progressive methods but repeatedly realigns the initial sequence
s as well as adding new sequences to the growing MSA. 2/22/2018
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10. PROGRESSIVE ALIGNMENT
The most widely used approach
Builds up a final MSA by combining pairwise
alignments beginning with the most similar pair and progressing to the most distantly r
elated
Progressive alignment methods require two stages:
First stage in which the relationships between the sequences are represented as a tree,
called a guide tree
‐Second step in which the MSA is built by adding
the sequences sequentially to the growing MSA according to the guide tree
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11. USING COBALT NCBI
Constraint based alignment tool that implements a general framework for
multiple alignment of protein sequences
COBALT finds a collection of pairwise constraints derived from database
searches, sequence similarity and user input, combines these pairwise
constraints, and then incorporates them into a progressive multiple
alignment
COBALT has reasonable runtime performance and alignment accuracy
comparable to or exceeding that of other tools for a broad range of
problems
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12. USING COBALT NCBI
COBALT has a general framework that uses progressive multiple alignment
to combine pairwise constraints from different sources into a multiple
alignment
When the same domain matches to multiple sequences, we can infer
several potential pairwise constraints based on these domain matches
CDD ( Conserved Domains Database ) also contains auxiliary information
that allows COBALT to create partial profiles for input sequences before
progressive alignment begins, and this avoids computationally expensive
procedures for building profiles
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13. RUNTIME OF COBALT
The runtime performance of COBALT is highly data driven
COBALT is about five times faster than ProbCons
COBALT is included in the NCBI C++ Toolkit
Numerous auxiliary programs were written in C, C++ and Perl to automate
testing and summarize results
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14. AVAILABILITY
COBALT is included in the NCBI C++ toolkit. A Linux executable for COBALT,
and CDD and PROSITE data used is available at:
https://www.ncbi.nlm.nih.gov/tools/cobalt/re_cobalt.cgi
Contact: richa@helix.nih.gov
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28. STEP 8
Notice that the above multiple alignment cant be edited “Edit and
Resubmit” link at the top of the COBALT results to remove the undesired
protein than search again.
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31. PROS AND CONS OF PROGRESSIVE
METHOD OF ALIGNMENT
PROS:
Efficient enough to implement on a large scale for
many (100s to 1000s) sequences.
Progressive alignment services are commonly available
on publicly accessible web servers, so users need not
locally install the applications of interest.
Most widely used method of multiple sequence
alignment because of speed and accuracy.
2/22/2018
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32. CONS…….
Progressive alignments are not guaranteed to be
globally optimal.
The primary problem is that when errors are made at
any stage in growing the MSA, these errors are then
propagated through to the final result.
Performance is also particularly bad when all of the
sequences in the set are rather distantly related
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