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We have purified a yeast protein kinase that is phospholipid-dependent and activated by Diacylglycerol (DAG) in the presence of Ca2+ or by the tumour-promoting agent tetradecanoyl-phorbol acetate (TPA). The properties of this enzyme are similar to those of the mammalian protein kinase C (PKC). The enzyme was purified using chromatography on DEAE-cellulose followed by hydroxylapatite. The latter chromatography separated the activity to three distinguishable sub-species, analogous to the mammalian PKC isoenzymes. The fractions enriched in PKC activity contain proteins that specifically bind TPA, are specifically phosphorylated in the presence of DAG and recognized by anti-mammalian PKC antibodies.
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Y Milner, and
S P Saville, and
A Dvir, and
D Mochly-Rosen, and
E Orr
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E Orr
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A J Simon, and
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A J Simon, and
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A Dvir, and
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E Orr
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