BCAP31 and hepatocellular carcinoma: Serpin E2 binds directly to B cell receptor-associated protein 31 (BAP31) and is regulated by BAP31 in Hep3b and MHCC97h cells, thereby affecting ERK1/2 and p38, and controlling hepatocellular carcinoma cell proliferation and colony formation (Zhang X. et al., 2020).