Is predicted to encode a protein with the following domains: Immunoglobulin I-set; Immunoglobulin subtype 2; Fibronectin type III superfamily; Immunoglobulin subtype; Immunoglobulin-like fold; Immunoglobulin-like domain superfamily; Immunoglobulin I-set domain; and Fibronectin type III. Is an ortholog of C. elegans rig-1.