Gastric proteinases--structure, function, evolution and mechanism of action.

Amino Acid Sequence Amino Acids/analysis Animals Aspartic Acid Endopeptidases Biological Evolution Chymosin/physiology Endopeptidases/biosynthesis,genetics,physiology Enzyme Activation Enzyme Precursors/metabolism Gastric Juice/enzymology Humans Hydrogen-Ion Concentration Models, Molecular Molecular Weight Pepsin A/physiology Pepsinogens/physiology,urine Peptic Ulcer/enzymology Protein Denaturation Stomach/enzymology Substrate Specificity Tissue Distribution

Amino Acids Enzyme Precursors Pepsinogens Endopeptidases Aspartic Acid Endopeptidases Pepsin A Chymosin