Enriched in germ line based on microarray studies. Is predicted to encode a protein with the following domains: CLASP N-terminal domain; TOG domain; Armadillo-type fold; CLASP N terminal; Armadillo-like helical; HEAT repeat; and Zygote defective protein 9. Is an ortholog of C. elegans zyg-9. In C. elegans, zyg-9 is involved in embryo development; meiotic spindle organization; and spindle elongation.