Why Was the Addition of Methionine Necessary During the Production

Multiple Choice

Why was the addition of methionine necessary during the production of somatostatin by recombinant bacteria?

A) So that it was compatible with the restriction enzyme
B) As a selectable marker
C) To allow the somatostatin to link to a bacterial protein
D) To increase the length of the peptide to make it more commercial
E) None of the answers are correct