The electronic states of pAB can be classified as either AB-like, OCC-like, or as states of a mixed character. The key question is the extent to which the AB-like and OCC-like states perturb each other. Previously, the effect of the electronic states of the scaffold on the OCC-like states was explored by Dickerson and coworkers . They found that when the energy of the first excited state in the unfunctionalized scaffold comes close to the energy of the cycling transition, the two electronic states begin to interact, spoiling the localized character of the OCC transitions. Here we apply similar analysis to electronic states of functionalized AB.