Characterization of Pseudomonas Mercury-resistance Transposon Tn502, Which Has a Preferred Insertion Site in RP1 Stanisich, Vilma A. and Arwas, R. and Bennett, P. M. and De La Cruz, F.,, 135, 2909-2915 (1989), doi = https://doi.org/10.1099/00221287-135-11-2909, publicationName = Microbiology Society, issn = 1350-0872, abstract= Tn502mer differs in size and restriction map from the well-characterized Tn501mer. It also differs in its preferential and high-frequency insertion into the 6 kb PstI-C region of RP1. The affinity for this region is perpetuated in pVS76, a clone of RP1 PstI-C in pBR322. Restriction mapping of independent pVS76::Tn502 derivatives revealed that Tn502 inserted at the same site (or small region) in PstI-C corresponding to the 35 kb coordinate in RP1. Insertion occurred in both orientations, but one was preferred. When PstI-C was deleted from RP1, acquisition of Tn502 was reduced and the sites of insertion randomized., language=, type=