42.下列那個酵素主要負責B細胞的體細胞超突變(somatic hypermutation)?
(A)RAG1(recombination-activating gene 1)
(B)RAG2(recombination-activating gene 2)
(C)TdT(terminal deoxynucleotidyl transferase)
(D)AID(activation-induced cytidine deaminase)
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統計: A(277), B(588), C(470), D(487), E(0) #3203779
統計: A(277), B(588), C(470), D(487), E(0) #3203779