has_constituent_monomer amino-acid residue organic amino compound molecule amino acid chain 2 2 A molecule that consists of amino acid residues (unmodified amino-acid residues and/or modified amino-acid residues) linked by peptide bonds or derivatives of such bonds. PR:000018263 protein An organic amino compound that consists of amino acid residues (unmodified amino-acid residues and/or modified amino-acid residues) linked by peptide bonds or derivatives of such bonds.