In B. burgdoreri strains B31 and 297, most of the Erp loci occupy the same position on the multiple copies of the cp32 plasmid present in these strains.
Nas cepas de B. burgdoreri B31 e 297, a maioría dos loci erp ocupan a mesma posición nas múltiples copias do plásmido cp32 presentes nestas cepas.