The TIM17:23 and TIM22 complexes of plants. A) A schematic representation of the TIM17:23 complex from yeast and plants. B) A table displaying the components of the TIM17:23 and TIM22 complexes in all plant species analysed. C) A diagram showing Arabidopsis Tim17-2 that contains four transmembrane domains (TM) and an extra C-terminal extension. This C-terminal extension is found in all higher plant species and motif analysis of the C-terminal extension identified to highly conserved regions of which both are related to nucleic acid binding proteins. Colors and abbreviations are the same as Figures 2 and 4.