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<p>and <a href="page.php?w=metagenomics">metagenomics</a>, where a start or stop codon may not be present in the obtained sequences. Such an ORF corresponds to parts of a gene rather than the complete gene.</p>

<p><big>Biological significance</big></p>
<p>One common use of open reading frames (ORFs) is as one piece of evidence to assist in <a href="page.php?w=gene_prediction">gene prediction</a>. Long ORFs are often used, along with other evidence, to initially identify candidate <a href="page.php?w=Genetic_code">protein-coding</a> regions or <a href="page.php?w=Non-coding_RNA">functional RNA</a>-coding</p><p>
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