Which amino acids are present in collagen?: (A) Glycine and cysteine, (B) Glycine and proline, (C) Glycine and arginine, (D) Arginine and tryptophan
Answer is B. The amino acid present in large quantities in collagen are GLYCINE, PROLINE and HYDROXYPROLINE.
Approximately 1/3rd of the amino acid are contributed by Glycine i.e every 3rd amino acid in collagen is GLYCINE.
Reference :- Satyanarayana 4th Edition, Pg no. 488