The project was aimed at identifying binding partners of endogenous SLX4 in HeLa cells. Whole cell extracts from HeLa Flp-In T-Rex cells were used for immunoprecipitation performed with anti-SLX4 antibodies from Bethyl Laboratories (A302-270A and A302-269A), either used alone or in combination. To discriminate bona fide SLX4 partners from non-specific proteins recognized by the anti-SLX4 antibodies, cells were transfected with control (Luc) siRNA or a siRNA targeting SLX4. After immunoprecipitation, protein complexes were analysed by LC-MSMS.