Glossary Molecular Biology and Computational Biology

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Unitary Matrix Also known as Identity Matrix. A scoring system in which only identical characters receive a positive score.

Up-and-Down the simplest topology for a helical bundle or folded leaf, in which consecutive helices are adjacent and antiparallel; it is approximately equivalent to the meander topology of a beta-sheet.

Uracil A nitrogenous base normally found in RNA but not DNA; uracil is capable of forming a base pair with adenine.

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