Phylogenetic analyses with systematic taxon sampling show that mitochondria branch within Alphaproteobacteria

@article{Fan2020PhylogeneticAW,
  title={Phylogenetic analyses with systematic taxon sampling show that mitochondria branch within Alphaproteobacteria},
  author={Luice Fan and Dingfeng Wu and Vadim V. Goremykin and Jing Xiao and Yanbing Xu and Sriram G. Garg and Chuanlun Zhang and William F. Martin and Ruixin Zhu},
  journal={Nature Ecology \& Evolution},
  year={2020},
  pages={1-7}
}
Though it is well accepted that mitochondria originated from an alphaproteobacteria-like ancestor, the phylogenetic relationship of the mitochondrial endosymbiont to extant Alphaproteobacteria is yet unresolved. The focus of much debate is whether the affinity between mitochondria and fast-evolving alphaproteobacterial lineages reflects true homology or artefacts. Approaches such as site exclusion have been claimed to mitigate compositional heterogeneity between taxa, but this comes at the cost… 

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