the choline-linked fraction contained high arachidonic acid contents in 1-o-alkyl-2-acyl- ( 18 % ) and 1,2-diacyl-sn-glycero-3-phosphocholine ( 11 % ) , with smaller amounts in 1-o-alk-1'-enyl-2-acyl species , whereas the arachidonic acid content of the ethanolamine-linked fraction was high in 1-o-alk-1'-enyl-2-acyl ( 26 % ) and 1,2-diacyl species ( 15 % ) and low in 1-o-alkyl-2-acyl species .
C0008405
choline
C0031716
phosphocholine