Prostaglandin I2 receptor MYRQQKRHQG SLGPRPRTGE DEVDHLILLA LMTVVMAVCS LPLTIRCFTQ AVAPDSSSEM GDLLAFRFYA FNPILDPWVF ILFRKAVFQR LKLWVCCLCL GPAHGDSQTP LSQLASGRRD PRAPSAPVGK EGSCVPLSAW GEGQVEPLPP TQQSSGSAVG TSSKAEASVA CSLC