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Describe the chemical properties of the sequence blocks in the polypeptide shown: DKEKRESNQYTMLVFI

Describe the chemical properties of the sequence blocks in the polypeptide shown: DKEKRESNQYTMLVFI

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Answer #1

This is the sequence given in the question “DKEKRESNQYTMLVFI”. It is a stretch of amino acid. It is composed of 16 amino acid. Amino acid are biological organic compounds contain amino group and the carboxyl group.

D- aspartic acid

K- lysine

E-Glutamic acid

K-lyine

R-arginine

E-glutamic acid

S-serine

N-asparagine

Q-glutamine

Y-tyrosine

T-threonine

M-methionine

L-leucine

V-valine

F-phenylalanine

I-isoleucine

Chemical properties of these amino acid

a. Decarboxylation

b. React with alkalies to form salt

c. React with alcohol to form ester

d. React with amines to form amides

These reaction are due to carboxylic group of amino acid

a. Amino acid react with mineral acid

b. Amino acid react with formaldehyde

c. Amino acid react with benzaldehyde

d. Amino acid react with Sanger’s reagent

These reaction are due to amino group of amino acid

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