Fig.Ā 7From: Structure-based directed evolution improves S. cerevisiae growth on xylose by influencing in vivo enzyme performanceStructural alignment of active sites of wild-type and V270AāA273G PirXI. The X-ray structures are of wild-type (gray) and V270AāA273G mutant (orange) PirXI, both isolated from yeast cells grown on xylose. Ligand colors: xylose (yellowāwild type, cyanāmutant); metals (light greenāwild type, dark greenāmutant)Back to article page