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Posterior distributions of birth rate (λ) between globins of human and (a) lamprey, (b) sea cucumber, and (c) clam obtained under sequence-only (light) and sequence–structure (dark) models. Increasingly diffuse indel rate posteriors lead to underestimated evolutionary distance estimates; λ =0.03718 estimated previously by Hein et al. (2000) is given as a reference (vertical line).
