Do we need many genes for phylogenetic inference?

@article{Aleshin2007DoWN,
  title={Do we need many genes for phylogenetic inference?},
  author={Vladimir Veniaminovich Aleshin and A. V. Konstantinova and Kirill V. Mikhailov and Mikhail A. Nikitin and Nikolai B. Petrov},
  journal={Biochemistry (Moscow)},
  year={2007},
  volume={72},
  pages={1313-1323}
}
Fifty-six nuclear protein coding genes from Taxonomically Broad EST Database and other databases were selected for phylogenomic-based examination of alternative phylogenetic hypotheses concerning intergroup relationship between multicellular animals (Metazoa) and other representatives of Opisthokonta. The results of this work support sister group relationship between Metazoa and Choanoflagellata. Both of these groups form the taxon Holozoa along with the monophyletic Ichthyosporea or… 
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