問題詳情
75. Which of the following statements about amino acids is CORRECT? ① Methionine is sulfurcontaining amino acids. ② The UV absorbance of phenylalanine at 280 nm is lower than thatof tyrosine. ③ Disulfide bond can be reduced by performic acid. ④ The side chain of histidineis an imidazole ring. ⑤ The pI value of arginine is lower than that of lysine.
(A) ①,②,③
(B) ①,③,④
(C) ②,③,④
(D) ①,②,④
(E) ②,③,⑤
參考答案
用户評論
【面試倒楣鬼-22幸運上後西】評論
①正確②W在280nm吸收是比較強的, 正確 (peak @ Phe 269nm, Tyr 275nm, Trp.....看完整詳解