>3D_helix;217
            protein_name:amonia transporter AmtB (E. coli)
            file_name:AmtB_Ecoli.txt
            entry_date:08mar05
            refman_number:21592
            endnote_number:
            author:Khademi,S., O'Connell,J.,III, Remis,J., Robles-Colmenares,Y., Miercke,L.J.W., Stroud,R.M. (2004) [Mechanism of ammonia transport by Amt/MEP/Rh:  Structure of AmtB at 1.35 Å] {Science, 305, 1587-1594}
            remarks:Sequence from PDB. Swiss-Prot sequence includes signal sequence (first 22 residues). Sequence below is from PDB and does not include signal sequence, therefore res#1 corresponds to res#23 in Swiss-Prot.
            pir_number:A90692, C64775, E85542
            Swiss_Prot_entry:AMTB_ECOLI
            Swiss_Prot_number:P69681
            Swiss_Prot_gene:amtB
            Swiss_Prot_name:ammonium channel
            PDB_title:Crystal structure of Ammonia Channel AmtB from E.Coli
            PDB_Identifier:1U7G
            N_terminal:out
            number_tmsegs:11
            tm_segments:A.7,33;B.38,68;C.96,120;D.125,148;E.163,182;F.195,221;G.224,253;H.256,275;I.280,306;J.310,334;K.347,380
            sequence:APAVADKADNAFMMICTALVLFMTIPGIALFYGGLIRGKNVLSMLTQVTVTFALVCILWVVYGYSLAFGEGNNFFGNINWLMLKNIELTAVMGSIYQYIHVAFQGSFACITVGLIVGALAERIRFSAVLIFVVVWLTLSYIPIAHMVWGGGLLASHGALDFAGGTVVHINAAIAGLVGAYLIGKRVGFGKEAFKPHNLPMVFTGTAILYIGWFGFNAGSAGTANEIAALAFVNTVVATAAAILGWIFGEWALRGKPSLLGACSGAIAGLVGVTPACGYIGVGGALIIGVVAGLAGLWGVTMLKRLLRVDDPCDVFGVHGVCGIVGCIMTGIFAASSLGGVGFAEGVTMGHQLLVQLESIAITIVWSGVVAFIGYKLADLTVGLRVPEEQEREGLDVNSHGENAYNA*