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apeR complementing plasmids. Bars indicate chromosomal DNA contained on the plasmids. Restriction enzyme sites are indicated as follows: H, HindIII; P, PvuII; R, EcoRI; and S, SalI. Triangles indicate Tn1000 insertions: closed-triangle insertions eliminated complementation, open-triangle insertions did not. The E. coli pstSCAB-phoU operon is aligned with the restriction map based on DNA sequence determined from the right end of plasmid pAPR3.
