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pur operon repressor, Bacillus subtilis type This model represents the puring operon repressor PurR of low-GC Gram-positive bacteria. This homodimeric repressor contains a large region homologous to phosphoribosyltransferases and is inhibited by 5-phosphoribosyl 1-pyrophosphate. [Purines, pyrimidines, nucleosides, and nucleotides, Purine ribonucleotide biosynthesis, Regulatory functions, DNA interactions]
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