A tetrapeptide, made up of natural amino acids, has alanine as the N-terminal residue which is coupled to a chiral amino acid. Upon complete hydrolysis, the tetrapeptide gives glycine, alanine, phenylalanine and leucine. The number of possible sequences of the tetrapeptide is ____ .
Answer
Answer (as printed): 4
The options are missing from the source scan for this question, so there is nothing here for this letter to point at. The letter is what the book printed.