how can cistiene crosslink?
Asked by alice | 15th Aug, 2015, 11:38: AM
Expert Answer:
Cysteine contains a highly reactive thiol group and therefore under oxidizing conditions a disulpide bond is formed between a pair of cysteines. In other words, the two substituted cysteines are cross-linked via formation of a disulfide bond.
Example:
Cysteine play a valuable role by crosslinking proteins, which increases the rigidity of proteins and functions to increase proteolytic resistance. Inside the cell, disulfide bridges between cysteine residues within a polypeptide, maintains the protein's tertiary structure. Insulin is an example of a protein with cystine crosslinking
Answered by Hanisha Vyas | 16th Aug, 2015, 11:04: AM
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