FIG. 7.

(A) Structural analysis of Bap. S represents the signal sequence. The positions of the LPXTG motif and the A, B, C, and D domains are shown. Region A (aa 45 to 360) contains two short repeats of 32 aa (A₁ and A₂) separated by 26 aa. Region B (aa 361 to 818) represents the remaining part of the N-terminal domain. A spacer region (aa 819 to 947) followed by region C (aa 948 to 2139) consisting of 258-nt tandem repeats constitutes the central domain of Bap. The carboxy-terminal region of Bap consists of region D (aa 2148 to 2208), which contains three short repeats of 18 aa followed by an incomplete D repeat, and the LPXTG motif. (B) Alignment of the amino acid residues within repeat blocks A, C, and D of the Bap protein. Substitutions are shown in boldface type.