Figure 2
From: UV irradiation induces homologous recombination genes in the model archaeon, Halobacterium sp. NRC-1

Repair of the two principle UV-induced photoproducts in Halobacterium sp. Repair of cyclobutane pyrimidine dimers (CPDs) and 6-4 photoproducts (6-4 pp) was measured after a UV-C dose of 50 J/m2. About 55 % of CPDs and 25 % of 6-4 pp remain unrepaired after 1 hour; after 3 hours, the percentages are 28% and 2% respectively.