Is predicted to encode a protein with the following domains: Immunoglobulin; Immunoglobulin domain; Immunoglobulin subtype 2; Immunoglobulin subtype; Immunoglobulin-like fold; Immunoglobulin-like domain superfamily; Immunoglobulin V-set domain; and Zwei Ig domain protein zig-8. Is an ortholog of C. elegans zig-8.