The genomic organization for the human P2X(7) receptor gene was determ
ined to comprise 13 exons. Alignment of the exon-intron junctions with
those for the rat P2X(2) gene demonstrated a precise conservation of
the boundaries for the first 10 introns. The human P2X(7) receptor gen
e was localized by in situ hybridization to chromosome 12q24. Radiatio
n hybrid mapping indicated that this is within 130 kb of the gene for
the homologous P2X(4) receptor.