An "age" has passed in the 40 years since we first observed recovery from radiation damage in irradiated bacteria. During the early 1930s, we had been discussing the possibility of rapid changes after radiation exposure with Farring- ton Daniels, Benjamin Duggar, John Curtis, and others at the University of Wisconsin. After working with living cells, we had concluded that organisms receiving massive insults must have a wide variety of repair mechanisms available for restoration of at least some of the essential properties of the cell. The problem was how to fmd and identify these recovery...
An "age" has passed in the 40 years since we first observed recovery from radiation damage in irradiated bacteria. During the early 1930s, we had been...
The excision-repair of ultraviolet-induced lesions in DNA involves a recogni- tion and incision step which is followed by excision of the damaged material, DNA repair resynthesis, and sealing of the fmal gap by polynucleotide ligase (e.g. Howard-Flanders, 1968). The initial incision step appears to require an endo- nuclease which is absent in the uvrA and uvrR mutants of E. eoli K12 (Braun et al., Part A of this book). The polAl strains are deficient in DNA polymerase I activity (de Lucia and Cairns, 1969) and are partially deficient in repairing single-strand breaks in DNA (incision breaks)...
The excision-repair of ultraviolet-induced lesions in DNA involves a recogni- tion and incision step which is followed by excision of the damaged mate...
