processing lignocellulosic biomass. Although the structural features of some GH9 enzymes
are known, the molecular mechanisms that drive their interactions with cellulosic substrates
remain unclear. To investigate the molecular mechanisms that the two-domain Bacillus
licheniformis Bl Cel9A enzyme utilizes to depolymerize cellulosic substrates, we used a
combination of biochemical assays, X-ray crystallography, small-angle X-ray scattering, and …