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Persistence of CPD induced by UV-B in germ cells of different ploidy after 0 h (open columns) and 6 h (filled columns) of in situ incubation in seminiferous tubules. Tubular segments at stages II–IV were exposed to UV-B for 15 s, followed by analysis for CPD with SCGE in combination with T4Endo V. Comets were sorted according to their DNA content (ploidy 1C, 2C and 4C). Photolesions are expressed as tail moments.
