Chromosomal repair kinetics of exponentially growing T. gammatolerans cells in MAYTP following irradiation at a dose of 2.5 kGy. Time 0 represents an incubation of 5 minutes at 85°C. Genomic DNA was visualized after digestion by the rare cutting enzyme SwaI. The ND lane corresponds to non-digested genomic DNA of non-irradiated cells. The '-' lane corresponds to the digested genomic DNA extracted from non-irradiated cells. A DNA marker (lambda concatamer DNA, PFGE Marker; New England Biolabs, Ipswich, MA, USA) was used as reference. The size of several bands is indicated by arrows.