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. Author manuscript; available in PMC: 2009 Oct 1.
Published in final edited form as: Birth Defects Res A Clin Mol Teratol. 2009 Apr;85(4):303–313. doi: 10.1002/bdra.20537

Figure 2.

Figure 2

Activity of the P4 promoter of the human FOLR1 gene. (A) Reporter constructs from the human FOLR1 gene. Promoter constructs included the publicly annotated transcription start site as well as 2 kb of upstream DNA for each respective construct. Firefly Luciferase as well as Escherichia coli β-galactosidase were used as reporter genes. (B) Reporter construct from the mouse Folr1 gene locus. (C) The human P4 promoter construct shows specific activity in F9 embryo carcinoma cells only after differentiation towards visceral endoderm.