Figure 7

Nu class GSTs {a) Na-GST-2, c) HpolGST} have larger binding cavity than sigma class GST {b) HsGST}. d) Overlay of the cavities reveals the considerable reduction in the active site size between sigma class (blue) and nu class (cyan). The structure of HpolGST is missing a loop in close proximity to the binding cavity and we modeled it as cartoon from the Na-GST-2 structure. The glutathione in the G-site is shown as red stick model.