DNA fragments containing the EPAS1-derived EREs were generated by PCR using the primers listed in Supplementary Table 1B, and cloned into the pGL3-promoter luciferase reporter vector (Promega Corporation, Madison, WI, USA). A cDNA encoding human ERα cloned into the pCMV5 mammalian expression vector was kindly provided by A. Odermatt (Basel, Switzerland). Human GATA-2, GATA-3, and GATA-4 cloned into pcDNA3.1 were kindly provided by C. Dame (Berlin, Germany). Dual luciferase reporter gene assays were performed as described previously [64 (link)].
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