the long chain bases had a characteristic pattern with 16-22 carbon chain lengths , and were classified into four groups : normal dihydroxy monounsaturated bases ( 40.6 % ) , branched dihydroxy monounsaturated bases ( 34.0 % ) , dihydroxy diunsaturated bases ( 22.0 % ) , and trihydroxy bases ( 2.2 % ) .
C1521970
characteristic
C1444754
lengths