TABLE 3.
Maximum-likelihood estimation of protein-specific rate (λ) and genomewide dispersion (ω) parameters using Poisson and negative binomial models of substitution counts in yeast, Drosophila, and mammalian proteins
| d.f. | l.l. | Estimated ω | 95% C.I. | |
|---|---|---|---|---|
| Yeast | ||||
| Poisson (λ) | 3081 | −49,712.9 | — | — |
| Negative binomial (λ, ω) | 3082 | −47,140.9 | 37.037 | 35.088, 39.216 |
| Drosophila | ||||
| Poisson (λ) | 7174 | −214,166.5 | — | — |
| Negative binomial (λ, ω) | 7175 | −178,263.0 | 13.699 | 13.423, 13.986 |
| Mammals | ||||
| Poisson (λ) | 8065 | −256,628.0 | — | — |
| Negative binomial (λ, ω) | 8066 | −179,484.9 | 3.494 | 3.435, 3.554 |
l.l., log likelihood.