HISTOCHEMICAL STUDIES ON THE LIPID REQUIREMENT FOR THE OXIDATIVE ENZYME ACTIVITIES : III. STUDIES ON THE EFFECTS UPON THE OXIDATIVE ENZYME ACTIVITIES OF PRE-TREATMENT WITH PHOSPHOLIPASES

Abstract

(1) Comparative studies have been made on the inhibitory effects of phaspholipase A, phospholipase C and phospholipase D upon the activities of cytochrome cxidase, DPNH diaphorase, TPNH diaphorase, succinic dehydrogenase and malic dehydrogenase. (2) The inhibitory effect of phospholipase A was conspicuous, however those of phospholipase C and phospholipase D were weak. (3) As a result of the compapative studies it has been clearly demonstrated that the most important components of the phospholipid molecule for the oxidative enzymes are the fatty acids combined at the α and β positions of glycerol.