PTGDS GI:32171249 prostaglandin H2 D-isomerase 1 mathhtlwmg lallgvlgdl qaapeaqvsv qpnfqqdkfl grwfsaglas 50 51 nsswlrekka alsmcksvva patdgglnlt stflrknqce trtmllqpag 100 101 slgsysyrsp hwgstysvsv vetdydqyal lysqgskgpg edfrmatlys 150 151 rtqtpraelk ekftafckaq gftedtivfl pqtdkcmteq