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Mapping of rovA transcriptional initiation sites in Y. enterocolitica. Primer extension (lane PE) was performed to determine if transcription in Y. enterocolitica initiated from the same promoters that have been reported for Y. pseudotuberculosis. P3 indicates that there is a potential third transcript in Y. enterocolitica that initiates downstream of the conserved promoter P1. Sequencing ladders shown on left side of the gel.
