Rabbit platelets contained significant amounts of alkylacyl compounds (10.4%) in choline phosphoglycerides (CPG) and alkenylacyl compounds (46.3%) in ethanolamine phosphoglycerides (EPG). The fatty chain profiles of alkylacyl and diacyl CPG, and alkenylacyl and diacyl EPG were considerably different from each other. Alkylacyl CPG contained higher amounts of 16:0 (35.0%) and 20:4 (20.9%) than diacyl compounds (4.5% and 12.6%, respectively). On the other hand, alkenylacyl EPG included a large amount of 20:4 (58.2%) in comparison with diacyl analogues (28.8%).
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Sugiura et al. (1983) studied this question.