BCYRN1 and neoplasm: As BC200 expression is reported to be elevated in tumours of the breast and lung relative to normal tissue [3, 7, 9, 10], we also assessed BC200 expression in primary breast epithelial cells (HMEC) as well as the immortalized breast epithelial cell line MCF-10A, normal lung fibroblasts (IMR-90) and the bronchial epithelial cell line 16HBE (Fig. 1c).