Schematic of the promoter region of the bone marrow stromal-cell antigen 2 gene. Putative promoter region, spanning 759 bp upstream of the translation start site ATG including 211 bp of exon 1 of the BST2 gene. Numbering is relative to the translation start site (+1). Potential cis-regulatory elements on the plus (+) and minus (-) DNA strands (determined by Transfac 3.2, MatInspector V2.2) are underlined and shown in bold.