title: Modified colorimetric ninhydrin methods for peptidase assay.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D003124:Colorimetry / Q000379:methods; D007192:Indenes; D009555:Ninhydrin; D010447:Peptide Hydrolases / Q000032:analysis*; D010455:Peptides / Q000032:analysis
chemical_list: D000596:Amino Acids; D007192:Indenes; D010455:Peptides; D010447:Peptide Hydrolases; D009555:Ninhydrin