Question

Disulfide bond is formed between which two amino acids ? A.Glycine and valine B.Methionine and cysteine C.Tyrosine and tryptophan D.Glutamine and aspargine​

Answer 1

Answer:

Disulfide bond is formed between cysteine and methionine(least chances).

Explanation:

Cysteine is the most abundant amino acid that forms a disulfide bond. Disulfide groups are formed between the thiol groups of cysteine residues by the process of oxidation. The formation of a disulfide bond involves a reaction between the -SH (sulfhydryl) side chain of the two cysteine residues. The s anion of one -SH group will attack the side chain of the other cysteine, and release electrons for transfer. That is, cysteine forms disulfide bonds among themselves.  

Methionine also contains Sulphur groups, but it generally does not form disulfide bonds like cysteine.