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A. mRNA levels of PRC1 core components BMI1 and RING1B in BTC cell lines (n = 3, n = 4 for EGi-1 and MzChA-2). B. Representative western blot image (cropped). C. Expression of BMI1 protein in BTC cell lines (n = ≥ 3). Abbreviations: BTC: biliary tract cancer; PRC1: polycomb repressive complex 1; BMI1: BMI1 polycomb ring finger oncogene; RING1B: ring finger protein 2.
