Fig. 5. Superposition of Erwinia chrysanthemi metallo-protease inhibitor on the exclusion domain. All structurally homologous Cα atoms from seven out of eight β-strands form 56 pairs, which after superposition yield an r.m.s.d. of 1.70 Å. After applying a 1.5 Å cut-off, the remaining 48 pairs yield an r.m.s.d. of 1.04 Å. Only the strand β-7 does not superimpose well, as in the exclusion domain it connects the hairpin loop and C-terminal strand β-8. The inhibitor is shown in red and the exclusion domain with the same color codes as used in Figure 1. The figure was prepared with MAIN (Turk, 1992) and rendered with RENDER (Merritt and Bacon, 1997).