題組內容

4. There are five different tripeptides shown below. (10 points) (at least one answer). 
(a) Ile-Ala-Phe, (b) Trp-Glu-Tyr, (c) Glu-Ala-Asp, (d) Trp-Lys-Met, (e) His-Cys-Arg
Which one of the above tripeptides:

(3) contain sulfur atom.