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Sequence alignment of S. coelicolor (SCO) and S. venezuelae (SVEN) amtB promoters by CLUSTAL W. The GlnR-protected region in S. coelicolor is overlined. Three pairs of “a sites” and “b sites” are underlined and labeled. The sequences below the a3-b3 and a1-b1 sites are the GlnR consensus sites for the S. venezuelae amtB promoter in the study by Pullan et al. (12), and the sections of sequences in boldface and underlined match the proposed GlnR consensus sequence.
