Q. Among the 20 standard proteins which coding amino acids, which of the following occurs the least number of times in proteins?
A. Glycine
B. Alanine
C. Tryptophan
D. Methionine
Answer: Tryptophan
A. Glycine
B. Alanine
C. Tryptophan
D. Methionine
Answer: Tryptophan