Fig. 6From: Engineering a wild-type diploid Saccharomyces cerevisiae strain for second-generation bioethanol productionThe biography of xylose isomerase (XI) in each strain. Enzyme activities (a), copy numbers (b) and transcription levels (c) of the gene encoding Ru-xylA (Bao et al. 2013; Hou et al. 2016a). All experiments were performed in triplicateBack to article page