Members of this family mediate cell adhesion via cell surface integrin binding [1]. They also induce haemagglutination and aggregation of amebocytes [2-3].

1: Extracellular matrix adhesion-promoting activities of a dermatan sulfate proteoglycan-associated protein (22K) from bovine fetal skin. Lewandowska K, Choi HU, Rosenberg LC, Sasse J, Neame PJ, Culp LA; J Cell Sci. 1991;99:657-668. PMID:1939376

2: Isolation, cDNA cloning, and characterization of an 18-kDa hemagglutinin and amebocyte aggregation factor from Limulus polyphemus. Fujii N, Minetti CA, Nakhasi HL, Chen SW, Barbehenn E, Nunes PH, Nguyen NY; J Biol Chem. 1992;267:22452-22459. PMID:1429596

3: Isolation and characterization of a novel protein toxin from fire coral. Iguchi A, Iwanaga S, Nagai H; Biochem Biophys Res Commun. 2008;365:107-112. PMID:17983598