Is predicted to encode a protein with the following domains: DB module; Domain of unknown function DB; Cysteine-rich repeat; Immunoglobulin I-set; Fibronectin type III superfamily; Fibronectin type III domain; Immunoglobulin-like fold; Immunoglobulin-like domain superfamily; Immunoglobulin I-set domain; and Fibronectin type III. Is an ortholog of C. elegans igdb-2.