question_answer

A tripe pride (X) on partial hydrolysis gave two dipeptides \[Cys-Gly\]and \[Glu-Cys\], i.e., and Identify the tripeptide.

A)  \[Glu-Cys-Gly\] 

B)    \[Gly-Glu-Cys\]

C) \[Cys-Gly-Glu\] 

D)    \[Cys-Glu-Gly\]

Correct Answer: A

Solution :

[a] : Since the tripeptide on hydrolysis gave two dipeptides Glu-Cys and Cys-Gly, hence cysteine must be in between glutamic acid and glycine.