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- W4246156619 abstract "We have previously reported that immobilized p21ras forms a GMPPNP-dependent complex with a MEK activity. Furthermore, the association of the MEK activity was found to be independent of the presence of Raf-1. We have extended those observations to show that MEK1 is the MEK activity previously described to associate with immobilized p21ras.GMPPNP. The association between MEK1 and immobilized p21ras.GMPPNP increased its specific activity towards p42MAPK. We detected the specific association of B-Raf with immobilized p21ras.GMPPNP. In contrast to Raf-1-immunodepleted lysates, preclearance of the cytosolic B-Raf significantly reduced, by 96%, the amount of MEK1 activity associated with immobilized p21ras.GMPPNP. The decrease in MEK1 activity correlated with complete loss in the binding of both B-Raf and MEK1 proteins with immobilized p21ras.GMPPNP. These data suggest that the p21ras.GMPPNP-dependent activation of MEK1 in brain extracts is dependent on the presence of the B-Raf protein kinase." @default.
- W4246156619 created "2022-05-12" @default.
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- W4246156619 date "1994-11-01" @default.
- W4246156619 modified "2023-10-17" @default.
- W4246156619 title "Association of MEK1 with p21ras.GMPPNP is dependent on B-Raf" @default.
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- W4246156619 doi "https://doi.org/10.1128/mcb.14.11.7153-7162.1994" @default.
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