Figure 2

OPRM1 levels in leukemic cells. Cell lysates (30 μg for actin blot; 80 μg for OPRM1 blot) were resolved in SDS–PAGE and subjected to immunoblotting with OPRM1 (Pierce, Waltham, MA, USA) or actin (Santa Cruz Biotech, Dallas, TX, USA) antibody. SDS–PAGE, SDS–polyacrylamide gel electrophoresis.