Organisation of the murine 5‐HT3 receptor gene and assignment tohuman chromosome 11

Abstract
We have isolated the murine gene encoding the 5‐HT3 receptor (5‐HT3R), a member of the ligand‐gated ion channels, that mediates a variety of physiological effects in central and peripheral neurons. DNA sequence analysis of the 5‐HT3R gene revealed its organisation in 9 exons distributed over approximately 12 kbp of DNA. Alternative use ofexon 9 splice acceptor sites generated two 5‐HT3R variants. The 5‐HT3R gene, whose structure is closely related to neuronal and muscle AChRα genes, as demonstrated by four common splice junctions, was localised on human chromosome 11.