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Table 4 Correction parameter
λ
2
for the sum statistics
k
= 2 and
k
= 3.
λ
2
is estimated by a fit for Eq. (
21
) using optimal the Gumbel-parameters
λ
and
S
0
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
10
4
λ
2
(
k
=
2
)
MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaaiiGacqWF7oaBdaqhaaWcbaGaeGOmaidabaGaeiikaGIaem4AaSMaeyypa0JaeGOmaiJaeiykaKcaaaaa@348F@
10
4
λ
2
(
k
=
3
)
MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaaiiGacqWF7oaBdaqhaaWcbaGaeGOmaidabaGaeiikaGIaem4AaSMaeyypa0JaeG4mamJaeiykaKcaaaaa@3491@
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%
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