ovaries dissected from fly strains were fixed in 1% PFA for 10 min at RT, homogenized using a pestle in 300 ml of RIPA buffer, and sonicated with Bioruptor (Diagenode).At least 100 ovaries were used per one IP. Immunoprecipitations were carried out with 5 µg antibody overnight at 4°C in a rotating wheel. ChIP libraries were prepared for Illumina NextSeq 500 using NEBNext ChIP-Seq DNA Sample Prep Master Mix Set for Illumina (NEB E6240) and NEBNext® Multiplex Oligos for Illumina® (Index Primers Set 1) (NEB E7335) according to the manufacturer's protocols.