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Location and orientation of IS4Bsu1 in comP of the spontaneous γPGA-negative mutants (A) and alignment of the IS4Bsu1 target sequences. (B). (A) Arrows indicate the direction of tnp transcription. The names of strains having the relevant insertion are indicated above the arrows. (B) Nine-base-pair target sites are underlined. Positions refer to the comP nucleotide coordinates (accession no. AB031552). In the consensus sequence, N is A, C, G, or T, and W is A or T.
