Organisms such as yeast and humans are capable of both nonhomologous end joining (NHEJ) and homologous recombination (HR), but bacteria have typically been assumed to be capable only of HR. A recent study shows that mycobacteria accomplish NHEJ using just two proteins (homologs of the eukaryotic Ku and DNA ligase IV), whereas eukaryotes require many factors.
- Geoffrey R Weller
- Vicky L Brandt
- David B Roth
