Immunoblots showing co-immunoprecipitation between Dpb11 and Sgs1 in the presence of 0.04% MMS in cells expressing either wild-type or the DPB11K55A mutant. DPB11-3HA or the BRCT mutant was ectopically expressed from its endogenous promoter and co-immunoprecipitated with SGS11-647-FLAG expressed from its endogenous promoter. 