Highlights d KIF18B, a nuclear kinesin, is required for efficient end-joining of DSBs d A Tudor-interacting motif (TIM) in KIF18B directly interacts with the 53BP1 Tudor d KIF18B's TIM facilitates the binding of 53BP1 to chromatin in the vicinity of DSBs d The motor activity KIF18B is also required for efficient 53BP1 recruitment

The scale of the COVID-19 pandemic highlighted the need for viral diagnostic systems that are accurate and could be deployed at large population scales. Large-scale diagnostic or surveillance testing of large numbers of people requires collection of infected biological samples that is easy and rapid.