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+<?php
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+
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+/**
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+ * @file
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+ *
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+ */
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+
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+?>
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+
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+<style>
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+ tr.blast-highlighted td {
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+ background: #F6FFEC;
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+ }
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+</style>
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+
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+<p>In bioinformatics, BLAST (Basic Local Alignment Search Tool) is an algorithm
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+for comparing primary biological sequence information, such as the amino-acid
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+sequences of different proteins or the nucleotides of DNA sequences. A BLAST
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+search enables a researcher to compare a query sequence with a library or
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+database of sequences, and identify library sequences that resemble the query
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+sequence above a certain threshold. Different types of BLASTs are available
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+according to the query sequences. For example, following the discovery of a
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+previously unknown gene in the mouse, a scientist will typically perform a
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+BLAST search of the human genome to see if humans carry a similar gene;
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+BLAST will identify sequences in the human genome that resemble the mouse
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+gene based on similarity of sequence.</p>
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+
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+<blockquote>Altschul,S.F., Gish,W., Miller,W., Myers,E.W. and Lipman,D.J. (1990) Basic
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+local alignment search tool. J. Mol. Biol., 215, 403–410.</blockquote>
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+
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+<table>
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+ <tr>
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+ <th>Query Type</th>
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+ <th>Database Type</th>
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+ <th>BLAST Program</th>
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+ </tr>
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+ <tr class= "blast-highlighted">
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+ <td rowspan="2">Nucleotide</td>
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+ <td>Nucleotide</td>
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+ <td><?php print l('blastn', '/blast/nucleotide/nucleotide');?>:
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+ Search a nucleotide database using a nucleotide query.</td>
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+ </tr>
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+ <tr class="blast-highlighted">
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+ <td>Protein</td>
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+ <td><?php print l('blastx', '/blast/nucleotide/protein');?>:
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+ Search protein database using a translated nucleotide query.</td>
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+ </tr>
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+ <tr>
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+ <td rowspan="2">Protein</td>
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+ <td>Nucleotide</td>
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+ <td><?php print l('tblastn', '/blast/protein/nucleotide');?>:
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+ Search translated nucleotide database using a protein query.</td>
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+ </tr>
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+ <tr>
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+ <td>Protein</td>
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+ <td><?php print l('blastp', '/blast/protein/protein');?>:
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+ Search protein database using a protein query.</td>
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+ </tr>
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+</table>
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