38. ______and________ are referred to as the 21st and 22nd amino acids.
(A) Cys and Sec
(B) Ser and Thr
(C) Sec and Pyl
(D) Trp and Tyr
(E) Pro and Pro-OH.

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統計: A(0), B(0), C(1), D(1), E(0) #3191448

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