The function of performic acid in protein sequencing is:
Breaking disulfide bonds is the accurate answer because it correctly identifies the biological function or role described in this question. In Protein, understanding the specific functions of molecules, enzymes, or structures is fundamental. Breaking disulfide bonds fulfills this particular biological role through its specific structural properties, biochemical activity, or physiological mechanism. The other options (Hydrolyzing peptide bonds, Identifying N-terminal amino acids, and Detecting aromatic residues) serve different biological functions or are associated with other processes, pathwa
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 4