prostaglandin D2 receptor DP2 DL1R G-protein coupled receptor 44 Category=gene. chemoattractant receptor-homologous molecule expressed on Th2 cells protein PR:000001547 IUPHARobj:339 PTGDR2 A prostanoid receptor that is a translation product of the human PTGDR2 gene or a 1:1 ortholog thereof. The preferred ligand is 11-dehydro-thromboxane B2. This receptor is not closely related to the prostaglandin D2 receptor encoded by PGD2. PIRSF:PIRSF038608 CD294 CRTH2 GPR44 prostanoid receptor