| Assay Method Information | |
| | In Vitro Binding Assay |
| Description: | hEP1 and hEP4 membranes are prepared from recombinant HEK293 cells stably expressing the human EP1 (Genbank accession number AY275470) or EP4 (Genbank accession number AY429109) receptors. hEP2 and hEP3 membranes are prepared from HEK293 cells transiently transfected with EP2 (Genbank accession number AY275471) or EP3 (isoform VI: Genbank accession number AY429108) receptor plasmids. Frozen cell pellets are homogenized in homogenization buffer using a Teflon/glass homogenizer. Membrane protein is aliquoted and quick frozen on dry ice prior to storage at -80 C. Homogenization buffer contained 10 mM Tris-HCl, pH 7.4, 250 mM sucrose, 1 mM EDTA, 0.3 mM indomethacin and plus Complete, with EDTA, obtained from Roche Molecular Biochemicals (Catalog Number 1 697 498).Kd values for [3H]-PGE2 binding to each receptor are determined by saturation binding studies or homologous competition. Compounds are tested in a 96-well format using a three-fold dilution series. |
| Affinity data for this assay | |
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