Enriched in male based on proteomic studies. Is affected by ivermectin based on RNA-seq studies. Is predicted to encode a protein with the following domains: Major sperm protein (MSP) domain; MSP (Major sperm protein) domain; PapD-like superfamily; and Immunoglobulin-like fold. Is an ortholog of C. elegans
msp-142;
msp-3; and
msp-38.