Figure 4
Stereoview showing the active-site environment. (a) drUNG with nitrate bound in the active site, (b) hUNG in complex with the substrate analogue pseudouracil (PDB code 1emh
; Parikh et al., 2000), (c) ecUNG in complex with uracil (PDB code 2eug
; Xiao et al., 1999). |