an analysis of sphingolipid composition by high performance liquid chromatography although the endogenous level of gm2 was elevated in tsd fibroblasts ( 0.39 nmoles/mg protein ) there was no increase in the cells of these patients ( 0 and 0.12 versus control of 0.17 nmoles/mg protein ) .
C0016030
fibroblasts
C0007634
cells