Figure 5From: Isolation of xylose isomerases by sequence- and function-based screening from a soil metagenomic libraryXI specific activity (U/mg protein-1) in E. coli (gray) and S. cerevisiae (stripped) strains overexpressing xym1 , xym2 and Piromyces sp . XI gene. The background activity was obtained from the same strains carrying the respective empty vectors.Back to article page