Histidine at the active site of phospholipase A2.

Acetophenones/metabolism,pharmacology Amino Acid Sequence Amino Acids/analysis Animals Barium/pharmacology Binding Sites Bromine/metabolism,pharmacology Calcium/pharmacology Drug Stability Enzyme Precursors/antagonists & inhibitors,metabolism Fatty Acids/pharmacology Histidine/metabolism Hydrogen-Ion Concentration Kinetics Lysophosphatidylcholines/pharmacology Pancreas/enzymology Peptide Fragments/analysis Phosphatidylcholines/metabolism Phospholipases/antagonists & inhibitors,metabolism Solubility Structure-Activity Relationship Swine

Acetophenones Amino Acids Enzyme Precursors Fatty Acids Lysophosphatidylcholines Peptide Fragments Phosphatidylcholines Barium Histidine Phospholipases Bromine Calcium