This family is comprised of several flagellar sheath adhesin proteins also called neuraminyllactose-binding hemagglutinin precursor (NLBH) or N-acetylneuraminyllactose-binding fibrillar hemagglutinin receptor-binding subunits. NLBH is found exclusively in Helicobacter which are gut colonising bacteria and bind to sialic acid rich macromolecules present on the gastric epithelium [1].

1: Inhibition of Helicobacter pylori adherence by a peptide derived from neuraminyl lactose binding adhesin. Chaturvedi G, Tewari R, Mrigank, Agnihotri N, Vishwakarma RA, Ganguly NK; Mol Cell Biochem 2001;228:83-89. PMID:11855744