Figure 6From: Metabolic pathway engineering based on metabolomics confers acetic and formic acid tolerance to a recombinant xylose-fermenting strain of Saccharomyces cerevisiaeEffects of formic acid on fermentation of xylose as a sole carbon source using S. cerevisiae MT8-1X/TAL (A, B) and MT8-1X/pGK404 (C, D). Formic acid was added to the fermentation at a concentration of 15 mM (A, C) or 30 mM (B, D). Symbols: closed squares, xylose; open circles, ethanol; closed triangles, glycerol; open squares, xylitol.Back to article page