Chimera (molecular biology)
Single nucleic acid sequence created from fragments that are normally separated / From Wikipedia, the free encyclopedia
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In molecular biology, and more importantly high-throughput DNA sequencing, a chimera is a single DNA sequence originating when multiple transcripts or DNA sequences get joined. Chimeras can be considered artifacts and be filtered out from the data during processing [1] to prevent spurious inferences of biological variation.[2] However, chimeras should not be confused with chimeric reads, who are generally used by structural variant callers to detect structural variation events[3] and are not always an indication of the presence of a chimeric transcript or gene.
In a different context, the deliberate creation of artificial chimeras can also be a useful tool in molecular biology. For example, in protein engineering, "chimeragenesis" (forming chimeras between proteins that are encoded by homologous cDNAs)[4] is one of the "two major techniques used to manipulate cDNA sequences".[4] For gene fusions that occur through natural processes, see chimeric genes and fusion genes.