2BEM:
reference: Crystal structure and binding properties of the Serratia marcescens chitin-binding protein CBP21., Vaaje-Kolstad G, Houston DR, Riemen AH, Eijsink VG, van Aalten DM, J Biol Chem. 2005 Mar 25;280(12):11313-9. Epub 2004 Dec 8. PMID: 15590674

This OCA Structure page
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