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. 2008 Jan 3;76(3):1230–1238. doi: 10.1128/IAI.01004-07

FIG. 1.

FIG. 1.

The pneumococcal GlnR regulon. GlnR regulates the expression of the glnRA and glnPQ-zwf operons and the gdhA gene. Repression of gene expression by GlnR is responsive to high concentrations glutamine, glutamate, and ammonium. Moreover, regulation by GlnR requires cellular GlnA for full repression of target genes.