title: The carboxylate ion in the active center of pepsin.
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D001224:Aspartic Acid; D001665:Binding Sites; D002384:Catalysis; D055598:Chemical Phenomena; D002621:Chemistry; D002850:Chromatography, Gel; D002951:Citrates; D004590:Electrophoresis, Paper; D004988:Ethers, Cyclic; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008433:Mathematics; D008956:Models, Chemical; D009596:Nitrophenols; D010434:Pepsin A / Q000032:analysis / Q000037:antagonists & inhibitors; D010455:Peptides / Q000032:analysis / Q000302:isolation & purification; D013552:Swine; D014867:Water
chemical_list: D000596:Amino Acids; D002951:Citrates; D004988:Ethers, Cyclic; D009596:Nitrophenols; D010455:Peptides; D014867:Water; D001224:Aspartic Acid; D010434:Pepsin A