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How does CRISPR technology work?

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How does CRISPR technology work?

CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) is a gene-editing technology that allows precise modification of DNA sequences in living organisms. It works as a molecular tool to cut and edit specific genes with high accuracy.

The system primarily involves two components:

  • Cas9 enzyme: acts as molecular scissors to cut DNA

  • Guide RNA (gRNA): directs Cas9 to the exact location in the DNA sequence

The guide RNA is designed to match a specific DNA sequence. It binds to the target region, and the Cas9 enzyme creates a double-strand break at that location.

Once the DNA is cut, the cell’s natural repair mechanisms take over:

  • Non-homologous end joining (NHEJ): may introduce small insertions or deletions, effectively disabling a gene

  • Homology-directed repair (HDR): can be used to insert or replace a specific DNA sequence if a template is provided

CRISPR is widely used in:

  • Genetic research (studying gene function)

  • Medicine (potential treatment of genetic disorders)

  • Agriculture (developing improved crops)

Its precision, efficiency, and cost-effectiveness make it a powerful tool in modern biotechnology.

Overall, CRISPR enables targeted gene editing, opening new possibilities for treatment, research, and innovation.