Biochemistry - Structure and Properties of Amino Acids - Discussion

Discussion Forum : Structure and Properties of Amino Acids - Section 1 (Q.No. 14)
14.
Which of the following is a nonstandard amino acid?
Cysteine
Isoleucine
Hydroxyproline
Histidine
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Rehana said:   7 years ago
Thank you for the explanation @Ahamed.

Ahamed Ismail Hossain said:   1 decade ago
A nonstandard amino acid is an amino acid that occurs naturally in cells but do not participate in peptide synthesis.

Some nonstandard amino acids are constituents of peptides, but they are generated by modification of standard amino acids in the peptide molecule by post-transnational modification.

Example of some non-standard amino acids: L-DOPA, GABA, 2-aminobutyric acid, dehydralanine, selenocysteine, pyrrolysine, N-formylmethionine, Hydroxyproline etc.

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