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The DNA ligase IV–Xrcc4 complex is responsible for the ligation of broken DNA ends in the non-homologous end-joining (NHEJ) pathway of DNA double strand break repair in mammals. Mutations in DNA ligase IV (Lig4) lead to immunodeficiency and radiosensitivity in humans. Only partial structural information for Lig4 and Xrcc4 is available, while the structure of the full-length proteins and their arrangement...
Advances in transmission electron microscopy coupled to increasingly powerful biocomputing techniques are opening enormous possibilities to understand the structure and function of complex biological processes performed by large multi-protein assemblies. This is an exciting time for electron microscopists because we can combine our efforts with X-ray crystallographers and NMR spectroscopists to reach...
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