title: Extraction to 2,4,6-trinitrophenyl derivatives of amino acids and peptides from aqueous acid. A simple method for determining aminotripeptidase activity.
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D000626:Aminopeptidases / Q000032:analysis / Q000097:blood*; D000818:Animals; D001557:Benzenesulfonates; D001921:Brain / Q000201:enzymology; D002251:Carbon Tetrachloride; D002642:Chick Embryo; D003510:Cyclohexanes; D004151:Dipeptides / Q000032:analysis; D004355:Drug Stability; D005069:Evaluation Studies as Topic; D006801:Humans; D008722:Methods; D009574:Nitro Compounds; D009578:Nitrobenzenes; D009842:Oligopeptides / Q000032:analysis*; D000439:Pentanols; D012584:Sciatic Nerve / Q000201:enzymology; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors; D014050:Toluene
chemical_list: D000596:Amino Acids; D001557:Benzenesulfonates; D003510:Cyclohexanes; D004151:Dipeptides; D009574:Nitro Compounds; D009578:Nitrobenzenes; D009842:Oligopeptides; D000439:Pentanols; D014050:Toluene; D002251:Carbon Tetrachloride; D000626:Aminopeptidases