All lanes : Anti-MDMX (phospho S367) antibody [15] (ab122926) at 1 µg/mlLane 1 : MCF cells preincubated with the proteasome inhibitor MG132 (20 uM)Lane 2 : MCF cells preincubated with the proteasome inhibitor MG132 (20 uM), exposed to adriamycin (3 uM) for 1 hourLane 3 : MCF cells preincubated with the proteasome inhibitor MG132 (20 uM), exposed to adriamycin (3 uM) for 2 hourLane 4 : MCF cells preincubated with the proteasome inhibitor MG132 (20 uM), exposed to adriamycin (3 uM) for 3 hourLane 5 : MCF cells preincubated with the proteasome inhibitor MG132 (20 uM), exposed to adriamycin (3 uM) for 4 hourLane 6 : MCF cells preincubated with the proteasome inhibitor MG132 (20 uM), exposed to etoposide (20 uM) for 1 hourLane 7 : MCF cells preincubated with the proteasome inhibitor MG132 (20 uM), exposed to etoposide (20 uM) for 2 hourLane 8 : MCF cells preincubated with the proteasome inhibitor MG132 (20 uM), exposed to etoposide (20 uM) for 3 hourLane 9 : MCF cells preincubated with the