FIGURE 8.

Rigidity of the BLIP-II interface residues. A, the eight BLIP-II molecules, six monomers from the asymmetric unit and two from the complexes (TEM-1 and Bla1), are aligned and show very limited movements. The two contact residues that move significantly are Leu-91 and Tyr-208 (labeled). B, a close-up view of Tyr-208 where the residues are split between two different rotamers is shown. Three monomeric versions of BLIP-II are positioned uniquely in comparison to BLIP-II from the complexes and the remaining monomers (see “Results” and “Discussion”).