Abstract
The partition region qsopAB of the Coxiella burnetii plasmid QpH1 was analyzed. Locus qsopA alone appears to fulfill the partitioning function; QsopA represses its own promoter 17-fold. Two partition-associated incompatibility sites were identified: incA in a 200-bp region covering the qsopA promoter and incB in the qsopB locus.