The heterogeneity of the glycerophosphate fraction of rat liver

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Abstract
The heterogeneity of a mixture was established from the changes in specific activity during chemical treatments. The "glycerophosphate" fraction of rat liver obtained by ethanol precipitation contained after hydrolysis with NaOH, at least 3 periodate-reacting phosphoric esters of widely differing specific activities. A compound having many of the properties of alpha-glycerylphosphorylcholine was found in a trichloroacetic acid extract of rat liver. This compound had a lower specific activity at 2 hrs. than lecithin and may be a degradation product of the latter.