A protein ‘ X ’ with molecular weight of 70 , 000 u , on hydrolysis gives amino acids. One of these amino acid is

Step-by-step solution

Amino acids contain amino ( - NH 2 ) and carboxyl ( - COOH ) functional groups. Depending upon the relative position of the amino group with respect to the carboxyl group, the amino acids can be classified as α ,   β ,   γ ,   δ and so on. Only α - amino acids are obtained on the hydrolysis of proteins. So, only in option (B) α -amino acid given all the other options are not α -amino acids.