CRISPR/Cas systems are known as promising "gene scissors" in the genome editing of plants, animals, and microorganisms by targeting specific regions in their DNA - and perhaps they can even be used to correct genetic defects. A team of scientists have now identified an enzyme, a special pair of RNA scissors, which is involved in CRISPR/Cas systems and the correct regulation of gene expression - in other words, in reading genes and translating their information into proteins.