https://www.selleckchem.com/pr....oducts/kynurenic-aci
4-1.5-fold strength of native PsrfA were selected. Subsequently, the ComQXPA-PsrfAM QS circuit was utilized to upregulate the expression of red fluorescent protein, and the same QS-based hfq-sRNA system was utilized to downregulate the expression of GFP simultaneously. Last, this bifunctional ComQXPA-PsrfAM QS circuit was verified again by fine-tuning the expression of α-amylase. Therefore, the engineered ComQXPA-PsrfAM QS cassette can be applied as a novel bifunctional QS circuit to flexibly control gene expression in C. glutami