Antigen: human EP3 receptor amino acids 308-327 . Host: rabbit . Cross Reactivity: (+) human, bovine, mouse, and rat EP3 receptors; (-) EP1, EP2, and EP4 receptors . Application(s): ICC and WB . As a result of splice variation, the EP3 receptor can be expressed as multiple isoforms that differ in the length and sequence of their C-terminal tails. The signal transduction mechanism varies depending on the isoform being expressed, implicating the importance of the C-terminal region of the receptor for coupling to G-proteins.