Abstract
DMSO resistant clones have been isolated from the inducible Friend leukemia cell line 5–86 both from unmutagenized cultures and following EMS mutagenesis. All the clones can grow in the presence of 1.8% DMSO and are non-inducible or poorly inducible for hemoglobin synthesis by DMSO as well as by other known inducers of Friend leukemia (FL) cells differentiation like hemin, hypoxanthine, hexamethylene bisacetamide. The clones are also defective for the expression of other properties of differentiating Friend cells like agglutinability by plant lectins and expression of the surface protein glycophorin. Some of the clones show an impaired ability to form tumors in vivo. These resistant clones might be useful for a genetic analysis of the differentiation process of Friend leukemia cells.
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