Membrane spanning 4-domains A2 MDTESNRRAN LALPQEPSSV PAFEVLEISP QEVSSGRLLK SASSPPLHTW LTVLKKEQEF LGFSISGMLS IISERRNATY LVRGSLGANT ASSIAGGTGI TILIINLKKS LAYIHIHSCQ KFFETKCFMA SFSTEIVVMM LFLTILGLGS AVSLTICGAG EELKGNKVPE DRVYEELNIY SATYSELEDP GEMSPPIDL