Precast acrylamide 4–12% gels of eluates from MCC-AP-MS/MS and AP-MS/MS using RPAP4, CDK9 and POLR2A. WCE, whole-cell extract; CYT, cytoplasm; NUP, nucleoplasm; CHR, chromatin. Arrowheads point to bands corresponding to the baits. Full arrows indicate examples of exclusive bands in the various fractions for each bait.