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Disulfide bridges are formed when the side chains of two amino acid residues react - VCE - SSCE Chemistry - Question 16 - 2010 - Paper 1
Question 16
Disulfide bridges are formed when the side chains of two amino acid residues react. The pair of amino acids that form the disulfide bridges could be A. cysteine an... show full transcript
Worked Solution & Example Answer:Disulfide bridges are formed when the side chains of two amino acid residues react - VCE - SSCE Chemistry - Question 16 - 2010 - Paper 1
Step 1
Identify the correct pair of amino acids:
Answer
The formation of disulfide bridges occurs specifically between cysteine residues. This is due to the presence of a thiol (-SH) group in cysteine, which can oxidize to form a covalent bond with another cysteine, resulting in a disulfide bridge (R-S-S-R). Therefore, the correct answer is option D: cysteine and glutamic acid.