PMC full text:
FIG. 2
Poly(U) polymerase activity of GST (control) and wild-type and mutant RHDV 3Dpol in the presence of increasing concentrations (white, gray, and black bars for lower to higher ion concentrations, respectively) of MgAcO (0.5, 1, and 2 mM), MnCl2 (0.25, 0.5, and 1 mM), or FeSO4 (0.08, 0.2, and 0.5 mM).