Figure 2

Rab31 expression levels in stably transfected breast cancer cells. (A) pAb RT3-IgG specifically detects rab31 in cell lysates from stably transfected MDA-MB-231 and CAMA-1 breast cancer cells in Western blot analyses. Vector control, MDA-MB-231, or CAMA-1 cells were stably transfected with the empty vector pRcRSV; batch, parental MDA-MB-231 (low endogenous rab31 expression) or CAMA-1 (no endogenous rab31 expression) cells were stably transfected with the pRcRSV-based rab31 expression vector; high, medium or low, selected cell clones of batch-transfected MDA-MB-231 or CAMA-1 cells with differing high, medium or low protein levels of rab31. (B) Rab31 antigen values (ng/mg of total protein) in rab31-transfected MDA-MB-231 and CAMA-1 cells, determined by rab31-ELISA. Mean values (± SEM) of at least three independent experiments are depicted.