Phospholipids Chiral at Phosphorus. 13. Stereochemical Comparison of Phospholipase A2, Lecithin-Cholesterol Acyl Transferase, and Platelet-Activating Factor

Abstract
Thiophospholipids and thiophosphate analogs of platelet activating factor were synthesized and used to compare the stereochemical properties in three different biological systems. Phospholipase A2 shows high stereo-specificity, and this has been substantiated by computer graphics. Lecithin-cholesterol acyl transferase shows no stereospecificity. Platelet aggregation shows, preliminarily, a small degree of stereospecificity.