FIG. 3.

UV resistance of spores and vegetative cells of B. subtilis DNA repair mutants. All strains were derivatives of the prototype laboratory strain 168. The average UV dose required to kill 90% of the population (LD₉₀ value) is given for vegetative cells (open bars) and spores (solid bars). LD₉₀ values are averages of values reported in the literature; the number of reports from which each value was derived is listed on the top of each bar. Data are from references 45, 58, 59, 113, 122, 126, 131, 132, 134, 179, 182, 185, 186 and 227 and from P. Fajardo-Cavazos (unpublished data).