2.7.1.173 D35A site-directed mutagenesis of Nrk2 718250 2.7.1.173 D36A site-directed mutagenesis of Nrk1 718250 2.7.1.173 E100A site-directed mutagenesis of Nrk2, mutant activity in ATP-dependent phosphorylation is below the level of detection 718250 2.7.1.173 E174R site-directed mutagenesis of Nrk2 718250 2.7.1.173 E98A site-directed mutagenesis of Nrk1, mutant activity in ATP-dependent phosphorylation is below the level of detection 718250 2.7.1.173 additional information enzyme NRK1 specific silencing in human ovarian carcinoma cell line OVCAR-3 by NRK1-specific siRNA 739212