Unrooted dendrogram of a range of plant AOX proteins showing three distinct groups of AOX proteins: monocot AOX1, dicot AOX1, and dicot AOX2. The asterisk indicates LeAOX1b, which is unusual in that it is a dicot AOX1 that sits within the monocot AOX1 grouping, and arrowheads denote thermogenic species. Abbreviations and data sources are as follows: as in Figure 3 and AtAOX1a, A. thaliana AOX1a (NP_188876); AtAOX1b, A. thaliana AOX1b (NP_188875); AtAOX1c, A. thaliana AOX1c (NP_189399); AtAOX2, A. thaliana AOX2 (NP_201226); GhAOX1, G. hirsutum AOX1 (ABJ98721); GmAOX1, G. max AOX1 (AAC35354); GmAOX2a, G. max AOX2a (AAB97285); GmAOX2b, G. max AOX2b (AAB97286); LeAOX1a, L. esculentum AOX1a (AAK58482); LeAOX1b, L. esculentum AOX1b (AAK58483); NaAOX1, Nicotiana attenuata AOX1 (Q676U3); NtAOX1, N. tabacum AOX1 (AAC60576); OsAOX1a, Oryza sativa AOX1a (BAA28773); OsAOX1b, O. sativa AOX1b (BAA28771); OsAOX1c, O. sativa AOX1c (BAB71945); PtAOX1, Populus tremula × P. tremuloides AOX1 (Q9SC31); StAOX1a, Solanum tuberosum AOX1a (BAE92716); TaAOX1a, Triticum aestivum AOX1a (BAB88645); TaAOX1c, T. aestivum AOX1c (BAB88646); VuAOX1, Vigna unguiculata AOX1 (AAZ09196); VuAOX2a, V. unguiculata AOX2a (ABM66368); VuAOX2b, V. unguiculata AOX2b (AAZ09195); ZmAOX1a, Zea mays AOX1a (AAR36136).