Abstract

Twelve and fifteen molecular species were detected in the three subclasses of choline glycerophospholipids (CGP) and ethanolamine glycerophospholipids (EGP), respectively. In the alkenylacyl glycerophosphocholine (GPC), 16:0–18:2 (17·5%) was the major species followed by 18:0–18:2 (13·7%), 18:1–18:1 (12·3%) and 16:0–20:4 (12·2%). 16:0–20:4 (18·7%) was the highest species in the alkylacyl GPC, while 18:0–18:2 (20·8%) was most abundant in the diacyl GPC. The major molecular species were 16:0–20:4, 16:0–18:2, 18:0–20:4 and 18:0–18:2 in both alkylacyl and diacyl analogues of CGP. The highest molecular species were 16:0–18:1 (20·2%) in the alkenylacyl, 16:0–18:2 (20·0%) in the alkylacyl and 18:0–18:1 (23·5%) in the diacyl subclasses of EGP. The four major molecular species in all three subclasses of EGP were 16:0–20:4, 16:0–18:2, 16:0–18:1 and 18:0–18:1. The fatty acids 16:0, 18:0 and 18:1 at the sn-1-position combined with various fatty acid species at the sn-2-position depending on the subclass of CGP or EGP.

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