FIGURE 3.

Glutathione occupies the glutamate and presumed cysteine-binding sites of ScGCL. In the stereodiagram, bound glutathione is shown in ball and stick representation, and pertinent active site residues are shown in stick representation. The atoms are colored as in Fig. 2, with the exception of ScGCL carbon atoms, which are colored green. Potential hydrogen bonds were identified in Chimera and are represented as solid black lines.