Larvae were dissected and the front part fixed at RT for 15 min with 1% or 0.2% Formaldehyde. Chromatin was extracted using a sucrose cushion followed by Micrococcal Nuclease treatment and 10 cycles of sonication in a Bioruptor Pico. The lysate was clarified by centrifugation before immunoprecipitation, washes, elution by reverse crosslinking at 65deg for 14h. After RNaseA and ProteinaseK treatment, the DNA from Input and Immunoprecipitation was purified using Phenol-Chloroform Extraction and Ethanol precipitation. NEB Next Ultra II