Variation of the vaa downstream region. A: Schematic drawing of the sequenced vaa-hitABL intergenic regions of the five isolates. Genetic fingerprints consisting of deletions (Δ1–2) and insertions (▼) of 90 bp upstream and 60 bp downstream to vmp-1 are shown. Identical vaa downstream regions were shared between isolates 4195 and PG21. The vaa gene categories are indicated by suffix -1, -3 or -2. B: Schematic comparison of the Vaa types of isolates PG21, 4195, and 132. The exchangeable cassettes are numbered III, IV, V, VII, and VIII, respectively. The percentages of identical residues between different parts of the proteins are shown.