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The minimal oriC and surrounding transcription. The position of the six DnaA boxes R1–R5 and M; 13-mer repeats L, M, and R; A+T-rich cluster; and binding sites for IHF and Fis proteins are indicated. Large arrows represent location and direction of major promoters near oriC. Small arrows represent weaker promoters within oriC. H, HindIII (+244); A, AccI (+285) (ref. 1 and references therein).
