RBBP6 and breast cancer: Figure 12 shows that the RBBP6 variant 3 is expressed by normal embryonic kidney cells compared with the breast cancer cells. The blank controls (Figure 12, lanes BL) showed no product as expected. The untreated Hek 293 cells (Figure 12A, lane 3) showed expression of the RBBP6 variant 3 while RBBP6 variant 3 was undetectable in MCF-7 cells (Figure 12A, lane 1) and in cervical Caski cells (Figure 12A, lane 2). These results were quantified from three independent experiments using Quantity One® 1D analysis software (Figure 13).