Lipid substrates and FAME products. FAMEs were prepared from 1 mg of cholesteryl oleate, 1 mg of glyceryl trioleate, 1 mg of dioleoyl PC, 1 mg of oleic acid, 0.05 mg of cis-9,10-methyleneocatadecanoic acid (a cyclopropane fatty acid), 0.05 mg of conjugated linoleic acids that were mainly composed of cis-9,trans-11 and trans-10,cis-12 isomers, 1 mg of olive oil, 1 mg of soybean oil, 1 mg of