| Statistics |
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| • | The program
employs Karlin-Altschul |
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| statistics, which
relates the score of an HSP |
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| to the expected
frequency of its occurrence |
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| • | The frequency
depends on the lengths of the |
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| query and
database sequences, and the size |
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| of the sequence
alphabet |
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| • | The expected
frequency of a score is |
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| represented by
the E parameter |
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