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Many γ-butyrolactone-autoregulator receptors control the production of secondary metabolites in Streptomyces spp. Hence, AvaR1, an autoregulator receptor protein in Streptomyces avermitilis, was characterized as a negative regulator of avermectin (Ave) production. Deletion of AvaR1 in a high-producing strain increased production of Ave B1a approx. 1.75(More)
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