Figure 4 | Scientific Reports

Figure 4

From: Deletion of QDR genes in a bioethanol-producing yeast strain reduces propagation of contaminating lactic acid bacteria

Figure 4

A novel strategy for reducing the risk of bacterial contaminations during bioethanol production. (A) The Ethanol strain used in this study excretes multiple amino acids via Qdr amino-acid exporters of the DHA1 family, thereby promoting proliferation of contaminating lactic acid bacteria. (B) Loss of Qdr transporters by means of homozygous mutations reduces amino acid excretion and cross-feeding of lactic acid bacteria, without altering ethanol production.

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