Examine the peptide. Peptide with three amino acid residues. The first residue contains a methyl group side chain. The second residue contains a hydrogen atom side chain. The third residue contains a hydroxymethyl group side chain. The amino group of the first side chain binds to the unshown remainder of the peptide. The carboxyl group of the third side chain binds to the unshown remainder of the peptide.
Determine which amino acids are present in the peptide.

serine

leucine

alanine

glycine

threonine
Select the N-terminal amino acid.

serine

leucine

alanine

glycine

threonine