 C Endogenous RBPJ co-purifies specifically with HA-L3MBTL3 but not with HA-EGFP, HA-TBL1X or HA-HEY2. IPs of HA-tagged L3MBTL3, EGFP, TBL1X or HEY2 in U87-MG cells followed by Western blot analyses using HA or RBPJ antibody. The experiment was independently replicated twice. EV: Empty Vector control; WB: Western blot; IP: immuno-precipitation.  