Abstract

Treatment of Friend leukemia cells with dimethylsulfoxide or hexamethy-lenbisacetamide, which induced erythroid differentiation, resulted in enhancement of fluorescence polarization of diphenylhexatriene in not only plasma membranes, but also in intracellular membranes. In a cell variant resistant to induction, the polarization values of intracellular membranes were not affected by the inducing agents, whereas plasma membranes had the same enhancement of polarization values as in sensitive cells. Therefore, Friend cell differentiation can be associated with the effect of the inducers on intracellular membranes, but not with the effect on plasma membranes.

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