FIG. 1.

Plasmid profiles of B. burgdorferi strain B31 clones MSK5, ML28, ML23, ML28, and MSK10. PCR analysis was performed as detailed in Materials and Methods with oligonucleotide primers listed in Table 2. PCR products were resolved by electrophoresis on a 1.5% agarose gel. Molecular size markers (in base pairs) are indicated on the left. The asterisk in the MSK7 panel indicates the location of a putative primer dimer observed with the lp28-4 oligonucleotide primers.