Introduction
Definition
Classification of polysaccharides
1- Homopolysaccharides
2-Heteropolysaccharides
What is heteropolysaccarides?
Type of heteropolysaccharides
Function of heteropolysaccharides
Conclusion
References
3. Introduction
Polysaccharides are carbohydrates formed by
more than 10 monosaccharides.
Heteropolysaccharide is a type of polysaccharide.
Heteropolysaccharides contain two or more different
monosaccharide units.
4. Definition
Polysaccharides are complex of carbohydrates.
Polysaccharides consisting of molecules of more
than one sugar or sugar derivative are called
heteropolysaccharide(heteroglycans).
9. What is Heteropolysaccharide?
Heteropolysaccharides is a types of polysaccharide
In heteropolysaccharide- molecules are formed by
different kinds of monosaccharides.
Exa- D-glucuronic acid and N-acetyl glucosamine.
12. Function of Peptidoglycan
A strong sheath that envelops the entire cell and
prevents cellular swelling.
The bacterial cell wall differs from that of all other
organisms by the presence of peptidoglycan.
13. AGAR
Agar made up of D- galactose and an l-
galactose derivative ether-linked between C-3
and C-6.
14. Agarose
Agarose is the agar component with the fewest
charged groups (sulfates,pyruvates).
The agarose forms a double helix.
Two molecules in parallel orientation, twist together with
a helix repeat of three residues.
water molecules are trapped in the central cavity. These
structures in turn associate with each other to form a gel.
16. Function of Agarose
Useful in the biochemistry laboratory.
Agar is also used to form a surface for the growth of
bacterial colonies.
Agarose gels are used as inert(inactive) supports for the
electrophoretic separation of nucleic acids, an important
part of the DNA sequencing process.
17. GLYCOSAMINOGLYCANS
Dissect the name- glycos - amino- glycans .
This large molecule starts with a sugar, glucose.
This glucose has an amino group (NH2) attached to it.
So that's where the aminoglycan part of the name
comes from.
this amino containing glucose is another glucose-like
sugar, So there is the final name of this molecule, ‘glycos
amino glycan'.
18. 1-Hyaluronan
Hyaluronic acid contains alternating residues of
D- glucuronic acid and N-acetyl glucosamine.
With up to 50,000 repeats of the basic disaccharide
units.
19. Function of (Hyaluronate)
It is a lubricant in the synovial fluid of joints.
Give vitreous humor of the vertebrate eye its jelly like
consistency.
contributes to tensile strength and elasticity of cartilages
and tendons.
20. 2-Chondroitin4-sulfate
It contains D- glucuronate and N-Acetylgalactosamine-4- or
6-sulfate.Chondroitin sulfate (The Greek chondros, means
"cartilage”).
20-60 disaccharides in per chain.
21. Function of Chondroitin Sulfates
Contributes to tensile strength and elasticity of
cartilages, tendons, ligaments and walls of aorta.
22. 3-Keratan
Keratan contains D-galactose and N acetyl D-
glucosamine 6 sulfate,25 disaccharides in per chain.
Keratan sulfates (Greek keras, “horn”) have no uronic
acid and their sulfate content is changeable. They are
present in cornea.
23. Function of Keratan sulfate
Present in cornea, cartilage bone and a variety of
other structures as nails and hair.
25. Function of Heparin
It is a potent natural anticoagulant produced in the Mast
Cells that causes antithrombin bind to thrombin and
produce inhibition of blood coagulation.
27. Function of Dermatan sulfate
Found mainly in skin, but also is in vessels, heart,
lungs. It may be related to coagulation and vascular
diseases and other conditions
29. Heteropolysaccharides in extracellular matrix
The 'trunk' like structure is Hyaluronic acid.
The 'branches' are proteins called core proteins.
Proteoglycan
31. Heter0polysaccharide made of different monosaccharides.
They provide extracellular support for organisms of all
kingdoms.
In animal tissues provides protection, shape and support to
cells, tissues and organs.
structural, cellular cement, biological sieve.
Bacterial and algal cell wall are strenthened by heteropoly
saccharides –peptidoglycan in bacteria, agar in red algae.
Conclusion
32. • PRINCIPLES OF BIOCHEMISTRY(Fifth
edition)-David L. Nelson & Michael M. Cox .
• WWW.BritannicaS.com(at 8 pm on 3rd sep)
• En.wikipedia.org(at 9pm on 1st sep)
References