10% to 20% gradient gels after bcl-2 immunoprecipitation of lysates from OCI/AML-5 cells, as controls or after treatment with ATRA or taxol. The panel at the top shows the immunoprecipitates, stained with anti–bcl-2. The bottom panels show the supernatants, stained with anti-bax. It is seen that treatment of the OCI/AML-5 cells did not change the amount of bax that did not coprecipitate with bcl-2.