When bacteria are attacked by a virus, they can defend themselves with a mechanism that fends off the genetic material introduced by the intruder. The key is CRISPR-Cas protein complexes. It is only in the last decade that their function for adaptive immunity in microorganisms has been discovered and elucidated.
Click here for original story, Researchers visualize activity of CRISPR genetic scissors in real time
Source: Phys.org