The carboxylate ion in the active center of pepsin.

Amino Acid Sequence Amino Acids/analysis Animals Aspartic Acid Binding Sites Catalysis Chemical Phenomena Chemistry Chromatography, Gel Citrates Electrophoresis, Paper Ethers, Cyclic Hydrogen-Ion Concentration Kinetics Mathematics Models, Chemical Nitrophenols Pepsin A/analysis,antagonists & inhibitors Peptides/analysis,isolation & purification Swine Water

Amino Acids Citrates Ethers, Cyclic Nitrophenols Peptides Water Aspartic Acid Pepsin A