Fig. 7. Phylogenetic tree of published ammonia transporters. GenBank Accession numbers and type of ammonia transporter are given in parentheses. Anopheles gambiae (EAA01247 Rh-like protein); Azospirillum brasilense (AAC38548 AMT/MEP family); Carcinus maenas (AF364404, Rh-like protein); Danio rerio (AAM90586 Rh-like protein); Drosophila melanogaster (AF64673, Rh-like protein); Emericella nidulans (AAL73117 AMT/MEP family); Geodia cydonium (CAA73029 Rh-like protein); Hebeloma cylindrosporum 1 (AAK82417 AMT/MEP family); Hebeloma cylindrosporum 2 (AAM21926AMT/MEP family); Homo sapiens 50 KDa (CAA45883 Rh-like protein), Homo sapiens RhBG (AAL05978 Rh-like protein); Homo sapiens RhCG (AAH30965 Rh-like protein); Methanosarcina acetivorans (AAM07268 AMT/MEP family), Nostoc sp. (BAB72949 AMT/MEP family); Oryzias latipes (BAB13346 Rh-like protein); Pongo pygmaeus (AAG00305 Rh-like protein), Saccharomyces cerevisiae (P53390, AMT/MEP family), Tuber borchii (AAL11032 AMT/MEP family); Xenopus laevis (BAB13345 Rh-like protein). Tree was constructed with Multalin (Corpet, 1988). PAM, percent accepted mutations (a measure of phylogenetic distance).