1974•The Journal of Nihon University School of DentistryOpen access

The Composition of Phospholipid and Phospholipase-A Activity in the Rat Submaxillary Gland (Part 1)

Hajime Murakami, Shunzo Kakishita, Shoko Murakami, Masae Miyazawa, Akinobu SANO

Abstract

1. A detailed composition of phospholipid has been examined in the rat submaxillary gland. It was recognized that there is phosphatidylcholine, phosphatidyl-ethanolamine (possibly containing phosphatidylserine) and sphingomyeline as a major constituent of phospholipids, that there is trace of lysophosphatidylcholine and unknown phospholipid. 2. The phospholipase A activity of unpurified tissue extract (fraction A) or purified tissue extract (fraction D), as the source of enzyme has been examined. The fraction A or fraction D hydrolysed phosphatidylcholine as a substrate, and liberate free fatty acid and formed lysophosphatidylcholine. From above results, it was established that phospholipase A activity is present in the rat submaxillary gland.

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Key concepts: Lysophosphatidylcholine, Phospholipid, Phosphatidylcholine, Phosphatidylserine, Phospholipase A1, Chemistry, Biochemistry, Phospholipase A2