Schematic representation of BVH proteins and their respective truncated regions (A and B) and of the chimeric protein composed of BVH-3C and BVH-11B (C). The numbers indicate the first and last amino acid (aa) residues of each construct. The plasmids used for the cloning of the different gene regions are indicated in parentheses. M, mature proteins; L, potentially lipidated recombinant proteins; hatched rectangles, regions conserved between BVH-3 and BVH-11 proteins; shaded rectangles, BVH-3-specific region; open rectangles, BVH-11-specific regions. The dotted line indicates the amino acid residues missing in strain SP63 (gene cloned in pET32 only). The arrow indicates the two residues (HindIII restriction site) introduced by the cloning of each gene truncate to form the chimeric protein.