Could you explain the answer

34. Cyanogen bromide, CNBr, cleaves peptides at the C-side of Met residues. For example, CNBr treatment of Gly-lle-Met-Val-Lys-Leu would yield Gly-lle-Met and ValLys-Leu. You are studying a monomeric protein that has 750 amino acids, with methionines at four positions 5, 68, 321, and 747. After digestion of your protein with CNBr, you separate the products on a size-exclusion column with a fractionation range 15kDa to 60kDa. How many peaks will you find from your size-exclusion column? Hints: a. The molecular weight of your protein is 83kDa b. The CNBr digestion went to completion. c. All peptide fragments can be detected as these elute from the size-exclusion column. a) 1 peak b) 2 peaks c) 3 peaks d) 4 peaks