title: Colorimetric determination of arginine residues in proteins by p-nitrophenylglyoxal.
mesh_terms: D001120:Arginine / Q000032:analysis*; D003124:Colorimetry / Q000379:methods; D007202:Indicators and Reagents; D007700:Kinetics; D010658:Phenylglyoxal / Q000031:analogs & derivatives; D011506:Proteins / Q000032:analysis*; D013329:Structure-Activity Relationship
chemical_list: D007202:Indicators and Reagents; D011506:Proteins; C030501:4-nitrophenylglyoxal; D001120:Arginine; D010658:Phenylglyoxal