Phorbol diester-induced alterations in the expression of protein kinase C isozymes and their mRNAs. Analysis in wild-type and phorbol diester-resistant HL-60 cell clones.

Abstract excerpt

In an HL-60 cell subline (PR-17) which was greater than 100-fold resistant to the differentiating and cytostatic activities of phorbol 12-myristate 13-acetate (PMA), the protein kinase C phenotype was found to be nearly identical to that of wild-type HL-60 cells. A measurable decrease (30%) in the specific activities of crude preparations of PR-17 cell protein kinase C was observed when the enzyme was measured...

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