Table 1 Summary of breast cell lines and tissue specimens in the study
| Â | Breast non-tumor cell lines | Breast cancer cell lines | Breast tumor tissues | Adjacent normal breast tissues |
|---|---|---|---|---|
No. of samples | 2 | 8 | 915 | 85 |
ER status | Â | Â | Â | Â |
 ER+ | 0 | 4 (50 %) | 664 (72.6 %) | 67 (78.9 %) |
 ER− | 2 (100 %) | 4 (50 %) | 196 (21.4 %) | 15 (17.6 %) |
 Unknown | 0 | 0 | 55 (6.0 %) | 3 (3.5 %) |
CNV | Â | Â | Â | Â |
 CN0 | na | na | 28 (3.1 %) | 2 (2.4 %) |
 CN1 | na | na | 162 (17.7 %) | 17 (20 %) |
 CN2 | na | na | 597 (65.2 %) | 66 (77.6 %) |
 Unknown | na | na | 128 (14.0 %) | 0 |
Availablity of exome-seq data | Â | Â | Â | Â |
 Yes | na | na | 750 (82.0 %) | na |
 No | na | na | 165 (18.0 %) | na |