Abstract
The lipid class compositions of subcellular fractions of SV40-transformed mouse fibroblasts derived from the logarithmic and stationary growth phase were compared. Cell populations of the stationary growth phase showed a relative decrease of the protein content and an increase of triglycerides and alkoxydiglycerides which could be located in the non-sedimenting fraction and in the nuclei and mitochondria containing fraction, respectively. Futheron, distinct shifts in the subcellular distribution of those lipid classes could be observed which exhibited no relative overall increase or decrease when the cells of both growth phases were compared. In the crude plasma membrane fraction the ratio "lipid class/protein" remained about constant with the exception of the phospholipids and alkoxydiglycerides.
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