21.下列何種胺基酸側鏈不具芳香環結構?
(A)天門冬醯胺(asparagine)
(B)苯丙胺酸(phenylalanine)
(C)色胺酸(tryptophan)
(D)酪胺酸(tyrosine)
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統計: A(465), B(18), C(36), D(42), E(0) #3818496
統計: A(465), B(18), C(36), D(42), E(0) #3818496