Key points are not available for this paper at this time.
It is well established that lipid fractions isolated from natural sources are not pure compounds even though they may be homogeneous with respect to the major analytical parameters. This is due to the presence of many molecular species differing only in the fatty acids esterified in the molecule. There is abundant evidence from experiments with 32p_ phosphate that the several forms of, for example, lecithin are metabolically distinct This has also been demonstrated by using 14Cacetate, with respect to both phospholipids It is thus important that methods be developed for the complete determination of the composition of lipids, and the work presented below is a pre- liminary investigation of a possible procedure.
F. D. Collins (1963) studied this question.