Descriptive notes on polypeptides Polypeptides,peptides, types of peptides, structure of dipeptide, tripeptide and oligopeptide and different functions of peptide

1. BIOCHEMISTRY & CLINICAL PATHOLOGY
TOPIC- POLYPEPTIDES
PRESENTED BY-
SHWETA MISHRA

2. POLYPEPTIDE
● Peptides are short polymers of amino acids(monomer) linked by
peptide bonds between two molecules when the carboxyl group of
one molecules reacts with the amino group of other molecule.
● Polypeptide are formed by long peptide chain containing large
numbers of peptide bonds.
● Peptide bond is written as-CONH.
● One end of every polypeptide called the amino terminal or N-
terminal, has free amino group.
● Other end, with its free carboxyl group, is called the carboxyl
terminal or C-terminal.

3. C-terminal
N-terminal

4. DIPEPTIDE:
A molecule containing two amino acids joint by a peptide bond
called dipeptide.
TRIPEPTIDE:
A molecule containing three amino acids joint by a peptide bond
called tripeptide.
OLIGOPEPTIDE:
A molecule containing few residue(less than 20) of amino acids joint
by a peptide bond called oligopeptide.

5. Structure of
Oligopeptide
Structure of Dipeptide & Tripeptide

6. FUNCTIONS OF PEPTIDE BOND
● Proteins have a wide range of functions in the human body.
● Peptides are important in muscle building. For example, GHRP
peptide is one of the finest Human Growth Hormone releasers.
● Peptides are also capable of raising prolactin hormone especially in
females.(vasoactive intestinal peptide (VIP)).
● Copper based peptides are responsible for giving us flawless skin
and protecting us from harsh sunny conditions.
● Some peptides like IPAMORELIN are also used to treat hunger
issues.
● Peptides are also used to treat injuries. For example, HEXARELIN
peptide has a pretty attractive healing potential.

7. THANK
YOU