<p style="text-align:center"><span style="font-size:26px">Essay 6 - About the Blast and BLAT.</span></p>

<p>In&nbsp;<a href="https://en.wikipedia.org/wiki/Bioinformatics" title="Bioinformatics">bioinformatics</a>,&nbsp;<strong>BLAST</strong>&nbsp;for&nbsp;<strong>B</strong>asic&nbsp;<strong>L</strong>ocal&nbsp;<strong>A</strong>lignment&nbsp;<strong>S</strong>earch&nbsp;<strong>T</strong>ool is an&nbsp;<a href="https://en.wikipedia.org/wiki/Algorithm" title="Algorithm">algorithm</a>&nbsp;for comparing&nbsp;<a href="https://en.wikipedia.org/wiki/Primary_structure" title="Primary structure">primary</a>&nbsp;biological sequence information, such as the&nbsp;<a href="https://en.wikipedia.org/wiki/Amino_acid" title="Amino acid">amino-acid</a>&nbsp;sequences of&nbsp;<a href="https://en.wikipedia.org/wiki/Protein" title="Protein">proteins</a>&nbsp;or the&nbsp;<a href="https://en.wikipedia.org/wiki/Nucleotide" title="Nucleotide">nucleotides</a>&nbsp;of&nbsp;<a href="https://en.wikipedia.org/wiki/DNA_sequence" title="DNA sequence">DNA sequences</a>. A BLAST search enables a researcher to compare a query sequence with a library or&nbsp;<a href="https://en.wikipedia.org/wiki/Database" title="Database">database</a>&nbsp;of sequences, and identify library sequences that resemble the query sequence above a certain threshold.</p>