TDP1 and cervical carcinoma: TDP1 WT and knockout cells for the cell extracts were kindly provided by S. El-Khamisy, University of Sheffield, United Kingdom [TK6 cells (human lymphoblastoid)], O. Kantidze, IGB, RAS, Moscow, Russia [HeLa cells (cervical cancer)], and S. Zakiyan, ICG, SB RAS, Novosibirsk, Russia [HEK293 cells (human embryonic kidney)].