Is predicted to encode a protein with the following domains: Fibronectin type III superfamily; Immunoglobulin I-set domain; Immunoglobulin I-set; Fibronectin type III; Immunoglobulin-like fold; Immunoglobulin subtype 2; Immunoglobulin domain; Immunoglobulin-like domain superfamily; Fibronectin type III domain; Immunoglobulin V-set domain; and Immunoglobulin subtype. Is an ortholog of C. elegans sax-3. In C. elegans, sax-3 is involved in generation of neurons and regulation of sensory neuron axon guidance.