30. Which of the following amino acid(s) can form a covalent bond in or between proteins?
(A)Cysteine only
(B) Methionine and cysteine
(C) Glutamate and cysteine
(D) Lysine and cysteine
(E) Tryptophan and cysteine
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1. 題目解析 本題要求選出可以在蛋白質...