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CRISPR-Cas9 and Genome Editing
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Gene Drive
A genetic engineering technique that promotes the inheritance of a particular gene or trait to increase its prevalence in a population.
Cas9
An enzyme that cuts DNA at a specific location dictated by an RNA guide sequence.
dCas9 (dead Cas9)
A modified form of Cas9 that still binds to DNA but no longer cuts, used in gene regulation applications.
Knock-in
A process where CRISPR-Cas9 and HDR are used to insert a specific DNA sequence into a particular genomic location.
HDR (Homology-Directed Repair)
A precise DNA repair mechanism used in conjunction with CRISPR-Cas9 when introducing specific mutations or inserting new genetic material.
Off-target effects
Unintended genetic modifications in non-target locations in the genome caused by CRISPR-Cas9 action.
Knockout
A genetic engineering process where CRISPR-Cas9 is used to disrupt the function of a gene, often by creating small insertions or deletions.
Cas12a (Cpf1)
An alternative CRISPR protein to Cas9 that has distinct PAM requirements and produces staggered DNA cuts.
Base Editors
A class of CRISPR-based tools enabling the direct, irreversible conversion of one DNA base pair to another without introducing DNA breaks.
NHEJ (Non-Homologous End Joining)
A DNA repair mechanism that often leads to insertions or deletions when used with CRISPR-Cas9, potentially knocking out a gene.
sgRNA (single-guide RNA)
A synthetic RNA molecule designed to guide Cas9 to a specific location in the genome where a cut is intended.
PAM (Protospacer Adjacent Motif)
A short sequence of DNA recognized by Cas9 enzyme to initiate binding and create a double-strand break.
Prime Editing
A versatile and precise genome editing technique that uses a Cas9 nickase and a specially engineered reverse transcriptase.
CRISPR-Cas9
A molecular tool used to make precise changes in the DNA of organisms, from bacteria to human cells.
On-target efficiency
The effectiveness with which CRISPR-Cas9 induces editing at the intended target site in the genome.
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