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Identification of the transcription start site of the PG_2212 gene of P. gingivalis by RLM-RACE. (A) PCR amplification of the PG_2212 promoter region. (B) Promoter region of PG_2212. The transcription start site adenine is marked in bold, and the arrow indicates the direction of transcription of PG_2212; the translation start codon (TTG) is indicated in bold; the −35 and −10 motifs are italicized and underlined, and the ribosome binding sites are underlined.
