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Accuracy of estimation of ancestral root amino acid frequencies. On the y-axes, the differences between inferred amino acids frequencies by ML and true amino acid frequencies used to simulate sequences are represented. a) Results obtained with the H–S LG+Fopt model. b) Results obtained with the H–NS LG+COaLA[2] model. c) Results obtained with the NH–NS LG+COaLA[2] model.
