Membrane spanning 4-domains A7 MLLQSQTMGV SHSFTPKGIT IPQREKPGHM YQNEDYLQNG LPTETTVLGD LSSLTSNAVS SVTAGAGLFL LADSMVALRT ASQHCGSEMD YLSSLPYSEY YYPIYEIKDC LLTSVSLTGV LVVMLIFTVL ELLLAAYSSV FWWKQLYSNN PGSSFSSTQS Q