Fruit(less) flies provide a clue.
Burgoyne
P S
PS
D000818:Animals; D000075364:Deleted in Azoospermia 1 Protein; D004330:Drosophila / Q000235:genetics*; D029721:Drosophila Proteins; D005260:Female; D005298:Fertility / Q000235:genetics*; D006801:Humans; D008297:Male; D051379:Mice; D009845:Oligospermia / Q000235:genetics; D016601:RNA-Binding Proteins / Q000235:genetics* / Q000502:physiology; D013091:Spermatogenesis / Q000235:genetics; D014998:Y Chromosome
C095668:DAZ1 protein, human; D000075364:Deleted in Azoospermia 1 Protein; D029721:Drosophila Proteins; D016601:RNA-Binding Proteins; C099859:bol protein, Drosophila