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MCMC-based and variational inference-based posterior distributions of the total branch length and the entropy of the amino acid profile of the largest cluster based on the mitochondrial data set (13 taxa and 6,622 amino acid positions; Rodríguez-Ezpeleta et al. 2006). (a) The total branch length and (b) the entropy of the amino-acid profile of the largest category. Blue and red histograms are the distributions of the samples by MCMC and by variational inference, respectively.
