Table 4 Correction parameter λ2 for the sum statistics k = 2 and k = 3. λ2 is estimated by a fit for Eq. (21) using optimal the Gumbel-parameters λ and S0 from optimal score statistics (k = 1). BLOSUM62 with affine gap costs (α = 12, β = 1) was used as scoring system.
From: Local sequence alignments statistics: deviations from Gumbel statistics in the rare-event tail
| L | 104 | 104 |
|---|---|---|
| 60 | 2.692 ± 0.30% | |
| 80 | 1.631 ± 0.63% | 1.074 ± 2.59% |
| 100 | 1.488 ± 0.23% | 0.649 ± 2.06% |
| 150 | 1.056 ± 0.06% | 0.344 ± 1.90% |
| 200 | 0.749 ± 0.13% | 0.280 ± 1.14% |
| 300 | 0.463 ± 0.15% | 0.189 ± 0.70% |
| 400 | 0.338 ± 0.29% | 0.139 ± 0.92% |