SUMMARY: After incubation for 6 hr. with uniformly labelled C-acetate, about 90% of the acetate carbon assimilated by non-photosynthetic var. was in the form of cellular materials insoluble in 60% (v/v) ethanol in water. Within this fraction about 80% of the assimilated carbon was in the form of glucose units of the polysaccharide paramylon, about 9% was in a fraction containing proteins, nucleic acids and probably other materials, and about 2% was in lipid. The ratio of assimilated carbon to total carbon in the paramylon was 3 to 5 times that in the protein + nucleic acid or lipid fractions.


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