Prostaglandin I2 receptor MTVVMAVCSL PLTIRCFTQA VAPDSSSEMG DLLAFRFYAF NPILDPWVFI LFRKAVFQRL KLWVCCLCLG PAHGDSQTPL SQLASGRRDP RAPSAPVGKE GSCVPLSAWG EGQVEPLPPT QQSSGSAVGT SSKAEASVAC SLC