5' Race to determine transcription start sites for representative V1Rs from each promoter subfamily. V1R gene structures as determined by 5' RACE PCR for members of each subfamily are illustrated. Coding exons (grey-filled boxes), non-coding exons (black boxes), and upstream introns (grey lines) are denoted. The chromosomal positions represented for each V1R gene are indicated (+/- indicates orientation). Transcription start sites are at the left-most position (grey arrow). The gene structures for the AB and D promoter subfamilies were determined previously ; all other gene structures shown were determined herein (see Methods).
Stewart and Lane BMC Genomics 2007 8:253 doi:10.1186/1471-2164-8-253