FIG. 4.

Space-filling model of the predicted α-CTD structure, with residues that were defective at rhaSR highlighted. The model is based on the atomic coordinates of Jeon et al. (15). Colored residues are those identified as important at the Φ(rhaS-lacZ)Δ216 promoter fusion. Pink residues are those that may be involved in interaction with DNA, and green residues are those that have some other role, possibly protein-protein interactions. Residue numbers for some of the important residues are shown. The two models are related to one another by a 90° rotation on the vertical axis.