... > chemical entity > group > organic group > amino-acid residue > alpha-amino-acid residue > N-terminal alpha-amino-acid residue > N-terminal N-acetyl-L-serine residue

... > chemical entity > group > organic group > amino-acid residue > N-terminal amino-acid residue > N-terminal alpha-amino-acid residue > N-terminal N-acetyl-L-serine residue