Abstract
In sets of mice (C57BL/10, B10.AKM B10.BR, C3H.SW and C3H/He) congenic at H-2 (major histocompatibility complex) and 2 backgrounds, and selected according to known differences in strain-specific lifespans, DNA repair efficiency in spleen cells was compared by 2 techniques: excision repair capacity following UV-irradiation, and bleomycin sensitivity. Significant differences between certain congenic partner sets were noted with both techniques, suggesting that the main histocompatibility complex influences DNA repair capacity.