Expression of Phf7EY03023 under the control of Scer\GAL4nos.UTR.T:Hsim\VP16 results in a severe loss of the female germline, while no germline loss is seen when Phf7EY03023 is expressed either under the control of Scer\GAL4C587 or under the simultaneous control of both Scer\GAL4bam.T:Hsim\VP16 and Scer\GAL4Scer\UAS.cHa.
Significant loss of the germline has already occurred at the time the female germline stem cell niche is forming in third instar larvae expressing Phf7EY03023 under the control of Scer\GAL4nos.UTR.T:Hsim\VP16.
Expression of Phf7EY03023 under the control of Scer\GAL4nos.UTR.T:Hsim\VP16 has no morphological effect on the male germline, and the males are fully fertile.
Expression of Phf7EY03023 under the control of Scer\GAL4nos.UTR.T:Hsim\VP16 rescues the size and morphology of 6% of the gonads of XX tra1/Df(3L)st-j7 animals to a wild-type looking pseudo-testis. These rescued pseudo-testes contain late-stage sperm, including sperm tails and condensed chromatin.