Fig. 3.
Arrangement of vlsE and the silent cassettes in B. burgdorferi B31, B. garinii Far04, and B. burgdorferi JD1. Cassette region sequences are shown in green, whereas flanking 5’ and 3’ vlsE sequences and homologous 5’ sequences at the beginning of the silent cassette arrays are shown in red. Arrows indicate the locations of inverted repeats. Arrowheads correspond with frameshifts, with the blue arrowheads indicating frameshifts between silent cassettes and red arrowheads showing those located within silent cassettes (as also indicated by the a and b designations of the ORFs before and after the frameshift). The B31 silent cassette 11 contains a stop codon (red asterisk).