Fig. 1.

Allele polymorphisms at L-repeat (A) and S-repeat (B) VNTR loci. The study code of each strain is shown above the lanes, and the size of the repeat unit is reported for each VNTR marker. The amplicon from the reference strain ACICU was loaded after each DNA size marker and used as an internal control for band size optimization. The asterisks denote amplification failures. The number of repeats is indicated below each DNA band. The PCR products were analyzed in 2% agarose gels (A; lanes M show the 100-bp ladder) or in 3% agarose gels (B; lanes M show the 20-bp ladder). Electropherograms shown in the figure were obtained in center II.