Figure 1From: PROCOV: maximum likelihood estimation of protein phylogeny under covarion models and site-specific covarion pattern analysisThe true tree length of a 17-taxa CPN60 tree used for simulating the datasets and the estimates under the different models. The tree lengths (the Y axis) are shown as the sum of the external branches (External) and the sum of the internal branches (Internal) and the total tree length (Total) separately. The data was simulated under JTT + the general covarion model and estimated under the other models.Back to article page