31. If the Asp in the chymotrypsin active site was mutated to another amino acid, which of the following would be considered an invisible mutation in that it is least likely to impact the function of the enzyme?
(A) Asp→ Asn
(B) Asp →Glu
(C) Asp → His
(D) Asp →Ser
(E) Asp→ Lys
答案：B
統計：A:0,B:1,C:0,D:0,E:0
難度：計算中