The H-type lectin domain is a unit of six beta chains, combined into a homo-hexamer. It is involved in self/non-self recognition of cells, through binding with carbohydrates [1]. It is sometimes found in association with the F5_F8_type_C domain Pfam:PF00754.

1: Biochemical and structural analysis of Helix pomatia agglutinin. A hexameric lectin with a novel fold. Sanchez JF, Lescar J, Chazalet V, Audfray A, Gagnon J, Alvarez R, Breton C, Imberty A, Mitchell EP; J Biol Chem. 2006;281:20171-20180. PMID:16704980