P2RX5 GI:28416937 purinergic receptor P2X5 isoform C 1 mgqagckglc lslfdyktek yviaknkkvg llyrllqasi laylvvwvfl 50 51 ikkgyqdvdt slqsavitkv kgvaftntsd lgqriwdvad yvipaqgenv 100 101 ffvvtnlivt pnqrqnvcae negipdgacs kdsdchagea vtagngvktg 150 151 rclrrenlar gtceifawcp letssrpe