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Chromosomal organization of a haploid and two rpoN partial diploids. The wild-type strain, DK101, contains a single, wild-type copy of rpoN (rpoN+) and an undisturbed Mx8 prophage attachment site (Mx8 att, stippled box). DK9602 has wild-type copies of rpoN inserted at the Mx8 att site, and DK9603, a derivative of DK9602, has a disrupted chromosomal rpoN allele in addition to the wild-type rpoN copies at Mx8 att.
