Flow cytometry (Fig. 1a) showed ZEGFR:2377-ST-[DyLight488] (red curves) clearly bound to A431 and less to FaDu, but not at all to MDA-MB-453 cells (human breast carcinoma), which correlated well with EGFR levels (western blot, Fig. 1c). This evidence concerns the gene EGFR and breast carcinoma.