Is predicted to encode a protein with the following domains: von Willebrand factor type A domain; von Willebrand factor A-like domain superfamily; von Willebrand factor, type A; and VWA N-terminal. Is an ortholog of C. elegans unc-36. In C. elegans, unc-36 is involved in several processes, including egg-laying behavior; nematode pharyngeal pumping; and serotonin receptor signaling pathway.