title: Identification of posttranslationally modified amino acids in proteins by mass spectrometry.
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis*; D007202:Indicators and Reagents; D013058:Mass Spectrometry / Q000379:methods; D010446:Peptide Fragments / Q000032:analysis; D010669:Phenylthiohydantoin; D011499:Protein Processing, Post-Translational; D011506:Proteins / Q000235:genetics*
chemical_list: D000596:Amino Acids; D007202:Indicators and Reagents; D010446:Peptide Fragments; D011506:Proteins; D010669:Phenylthiohydantoin