Figure 5 - full size

 

Figure 5.
Figure 5. The structures of the active sites of various RNases H. The side-chains of the active-site residues in the crystal structures of metal-free (green), Mn2+-bound (blue), and Mg2+-bound (magenta) Bst-RNases HIII, Tk-RNase HII (red), and E. coli RNase HI (cyan) are shown. The view direction is the same as in 1 and 3.

The above figure is reprinted by permission from Elsevier: J Mol Biol (2006, 356, 165-178) copyright 2006.