the pattern of incorporation of radioactivity from the substrates into alkyl and alk-1-enyl moieties of ether phospholipids and into alkyl moieties of wax esters reveals the following : ( 1 ) the enzymes catalyzing the biosynthesis of alkylacylglycerols , the common intermediates of cholinephospholipids and ethanolaminephospholipids , have no substrate specificity with regard to position of the double bond of either cis- or trans-octadecenols or of intermediate ether lipids derived therefrom .
C0043076
wax
C0023779
lipids