
RNA kinase versus DNA kinase activity. Reaction mixtures (10 µL) containing 50 mM Tris-HCl, pH 7.5, 50 mM NaCl, 2 mM DTT, 1 mM MgCl2, 0.1 mM GTP, 100 nM (1 pmol) 10-mer 5′-OH RNA or DNA substrate 3′-labeled with Cy5 (depicted at top), and MciKIN as specified were incubated at 37˚C for 5 min. The reactions were quenched with formamide/EDTA, and the products were analyzed by urea-PAGE.










