A family IIb xylan-binding domain has a similar secondary structure to a homologous family IIa cellulose-binding domain but different ligand specificity.
Simpson, P.J., Bolam, D.N., Cooper, A., Ciruela, A., Hazlewood, G.P., Gilbert, H.J., Williamson, M.P.(1999) Structure 7: 853-864
- PubMed: 10425686 
- DOI: https://doi.org/10.1016/s0969-2126(99)80108-7
- Primary Citation of Related Structures:  
1XBD, 2XBD - PubMed Abstract: 
Many enzymes that digest polysaccharides contain separate polysaccharide-binding domains. Structures have been previously determined for a number of cellulose-binding domains (CBDs) from cellulases.
Organizational Affiliation: 
Department of Molecular Biology and Biotechnology, Krebs Institute, University of Sheffield, UK.