Figure 6
![Figure 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1754-6834-6-103/MediaObjects/13068_2013_Article_341_Fig6_HTML.jpg)
Genetic approaches that improved both ethanol production and tolerance. (A-B) Transcriptional programs of nine adhs and six Ï factors from ethanol shock to tolerance. (C-D) Growth curves of Thermoanaerobacter sp. X514 wild-type strain and wild-type strains that carried on the pIKM1 plasmid: a vector-only control, an adh locus (Teth5140145-0146) or a Ï24 cluster (Teth5141847-1848) under 0% (C) and 1% (D) exogenous ethanol. Strains were grown at 45oC in QRCM medium. (E) Ethanol production of these engineering strains (Xvector, X adhE and XÏ24) at stationary phase, which were grown at 45oC in QRCM medium.