Is predicted to encode a protein with the following domains: Fibronectin type III superfamily; Fibronectin type III; Immunoglobulin-like fold; Immunoglobulin subtype 2; Immunoglobulin domain; Immunoglobulin-like domain superfamily; Fibronectin type III domain; and Immunoglobulin subtype. Is an ortholog of C. elegans C27B7.7 and igcm-2 and members of the C. elegans zig gene class including zig-3.