Abstract
Abstract Phospholipase A and B activity of several Egyptian snake venoms and scorpion toxin was determined by employing the rates of hydrolysis of lecithin and lysolecithin indicating phospholipase A activity and phospholipase B activity, respectively. Phospholipase A showed maximal activity at pH range 7·0–9·0. Marked activation of the enzyme occurred upon the addition of ether, sodium deoxycholate, Ca 2+ and Mg 2+ , while inhibition occurred upon the addition of EDTA, or a combination of sodium deoxycholate and calcium. The enzyme phospholipase B showed maximal activity at pH range 8·0–10·0 and was inhibited by EDTA and ether.
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