CRISPR can remember past viruses
Bacteria and archaea retain fragments of previously encountered viral genomes in CRISPR sequences. Those fragments enable RNA-guided defenses that can block later infections by the same viruses.
How CRISPR remembers past viral infections
Bacteria and archaea retain fragments of previously encountered viral genomes in CRISPR sequences. Those fragments enable RNA-guided defenses that can block later infections by the same viruses.