FIG. 3.

Comparison of the Esp, Rib, and C alpha proteins, highlighting the global organizational similarity of the three proteins. Regions with high degree of sequence homology are marked by dotted lines, with the percent identity indicated. The Esp structure is derived from strain MMH594 (this study), the Rib structure is derived from group B streptococcal strain BM110 (49), and the C alpha structure is derived from group B streptococcal strain A909 (33). The bottom panel shows alignment between the 82-residue C repeat of Esp and the corresponding repeats in Rib and C alpha. Identical residues are shown in boldface type. The highly conserved 13-residue region within the repeats is underlined.