[Term] id: PR:000044667 name: IP(3) receptor def: "A ligand-gated ion channel protein that is a translation product of the human ITPR1, ITPR2, or ITPR3 genes, 1:1 orthologs thereof, or a semi-ortholog thereof." [PRO:XQ] comment: Category=family. xref: IUPHARfam:123 is_a: PR:000044671 ! ligand-gated ion channel protein