High-resolution crystal structures of alternate forms of the human CD44 hyaluronan-binding domain reveal a site for protein interaction

Two alternate crystal forms of the human CD44 hyaluronan-binding domain, one hexagonal and one monoclinic, have been determined at 1.60 and 1.08 Å resolution, respectively. A short peptide found in the monoclinic form may identify a site of CD44 for protein-protein interactions.