Refinement of CAR/RXR bipartite binding motif models. The x-axis represents an index of binding sites models of increasing site widths beginning with the initial input parameters defining site width and gap range were 5<[0,8]>5. For example, Model 1 corresponds to the motif pattern: 5<[0,8]>5, Model 2 is 5<[0,8]>6; where the final model, number 30, corresponds to the pattern 10<[0,8]>9. The unit incremental information (UII) value is computed for each motif and displayed on the Y-axis. The maximum UII usually has the highest information density and is indicative of the optimal model.