Update information. 293T cells were transfected with Flag-tagged RB1 with or without MYC. After 48 h, the cells were lysed with IP buffer and immunoprecipitated with Flag-conjugated agarose beads (Sigma-Aldrich). The bound proteins were eluted with 2% SDS and digested overnight with sequencing grade modified trypsin (Promega, PRV5111). The obtained peptides were analyzed using a nanoflow EASY-nLC 1200 system (Thermo Fisher Scientific, Odense, Denmark) coupled to an Orbitrap Exploris480 mass spectrometer (Thermo Fisher Scientific, Bremen, Germany). The results were processed with the UniProt human protein database (75,004 entries, download on 07-01-2020) using Protein Discoverer (Version 2.4.1.15, Thermo Fisher Scientific) and Mascot (Version 2.7.0, Matrix Science).