UASt regulatory sequences drive expression of an inverted repeat.
Males expressing CG31287KK112992 under the control of Scer\GAL4bam.PU are semi-sterile and decreased sperm competition (decreased second male paternity success); their seminal vesicles contain fewer mature sperm than controls; although large amounts of sperm are transferred to the female bursa and present in the seminal receptacle at 30min post copulation, they are significantly decreased at 24h post copulation.