This family of proteins represents the core region of Bd37, a surface antigen of B.divergens which is GPI-anchored at the surface of the merozoite. The structure of the protein consists of mainly alpha folds and has three sub domains [1].

1: The solution structure of the adhesion protein Bd37 from Babesia divergens reveals structural homology with eukaryotic proteins involved in membrane trafficking. Delbecq S, Auguin D, Yang YS, Lohr F, Arold S, Schetters T, Precigout E, Gorenflot A, Roumestand C; J Mol Biol. 2008;375:409-424. PMID:18035372