“Researchers at Vilnius University in Lithuania introduced a new, more versatile genetic toolkit called the type IV-A CRISPR system. Described in a study published Oct. 29 in the journal Nature Communications, the system deactivate genes in an impermanent manner, giving researchers more control over gene activity…

by unraveling DNA’s double helix, the type IV-A system can stably but reversibly suppress a gene’s activity without having to cut its DNA.”

From Live Science.