Fig. 1From: A sensitive luminescence syncytium induction assay (LuSIA) based on a reporter plasmid containing a mutation in the glucocorticoid response element in the long terminal repeat U3 region of bovine leukemia virusConstruction of reporter plasmids. Schematic presentation of reporter plasmids bearing several BLV-LTR promoters: the full-length BLV-LTR promoter; pBLU3-EGFP with the BLV-LTR U3 region promoter; and pBLU3GREM-EGFP with a BLV-LTR U3 region containing a mutation in the glucocorticoid response element (GRE). The sequence of the GRE in the BLV-LTR U3 region and its inactive mutation were reported previously [11, 12]Back to article page