Regulation of the bovine Nanog 5’-flanking region and promoter activities in HEK293T, EBTr, and MBDK cell lines. (A) Schematics of the series of the bovine Nanog promoter deletion construct. (B) Bovine Nanog 5’-deletion constructs and pRL-TK were transfected into HEK293T cells (human embryonic kidney cell line, top), EBTr cells (bovine trachea cell line, middle), and MDBK cells (bovine kidney cell line, bottom). Cells were harvested after 48 h, followed by measurement of luciferase activity. Firefly luciferase activity was normalized to Renilla luciferase activity. Data shown represent the mean±standard deviation of three independent experiments. HEK293T cells, human embryonic kidney cell line; EBTr cells, bovine trachea cell line; MDBK cells, bovine kidney cell line.