Abstract
In order to establish the positional specificity of phospholipase A, two structural isomeric -α-phosphatidyl ethanolamines were prepared by a synthesis de novo. The phospholipase present in Crotalus adamantheus venom liberated nearly one equivalent palmitic acid from (γ-linolenoyl-β-palmitoyl-)-α-phosphatidyl ethanolamine, while practically one equivalent of linolenic acid was released from (γ-palmitoyl-β-linolenoyl-)-α-phosphatidyl ethanolamine.
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