阿摩線上測驗
2. Insulin is a protein composed of two peptide chains connected by a disulfide bond. Which amino acid side chain can form this covalent bond?
(A) cystine
(B) cysteine
(C) isoleucine
(D) proline
(E) None of the above
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統計： A(2), B(1), C(0), D(0), E(1) #3420904
統計： A(2), B(1), C(0), D(0), E(1) #3420904
