Functions as a transcriptional activator in a promoter context-dependent manner. Involved in regulation of the alpha- globin gene in erythroid cells. Activation of the alpha-globin promoter in erythroid cells is via synergistic interaction with TFCP2. Functions as a trans-acting factor that regulates the domestic strain CYP2D9 gene through specific association with the regulatory element SDI-A1. Binding to SDI-A1 depends on the type of nucleotide at position 299\; binding is abolished by a nucleotide substitution at this position. Modulates the placental expression of CYP11A1 (By similarity).
Henderson, Frederick, Wang, Hollier, Clayman: "LBP-1b, LBP-9, and LBP-32/MGR detected in syncytiotrophoblasts from first-trimester human placental tissue and their transcriptional regulation." in: DNA and cell biology, Vol. 27, Issue 2, pp. 71-9, (2008) (PubMed).