Members of this family are predominantly found in Vibrio cholerae sialidase, and adopt a beta sandwich structure consisting of 12-14 strands arranged in two beta-sheets. They bind to lectins with high affinity helping to target the protein to sialic acid-rich environments, thereby enhancing the catalytic efficiency of the enzyme [1].

1: Sialic acid recognition by Vibrio cholerae neuraminidase. Moustafa I, Connaris H, Taylor M, Zaitsev V, Wilson JC, Kiefel MJ, von Itzstein M, Taylor G; J Biol Chem. 2004;279:40819-40826. PMID:15226294