Question

Which of the following statements is false?

(a) Oxidation of cysteine residue with performic acid is done to break disulfide bond in proteins

(b) Reduction of cysteine residue with dithiothreitol is done to break disulfide bond in proteins

(c) Reduction of cysteine residue with performic acid is done to break disulfide bond in proteins

(d) Reduced cysteine is further acetylated by iodoacetate

I have been asked this question by my college director while I was bunking the class.

The query is from Protein Sequences and Evolution topic in section Amino Acids, Peptides and Proteins of Biochemistry

Answer 1

The correct answer is (c) Reduction of cysteine residue with performic acid is done to break disulfide bond in proteins

To elaborate: Oxidation of cysteine residue with performic acid is done to break disulfide bond in proteins.