Incidence of mutants with single and multiple mutations.

aUV-doses (J/m2) are shown in parentheses. bThe category of can1 mutants “DSB-cen, UV (45)” was combined from the group of single can1 mutants (Table S7) and double can1 ura3 mutants (Table S8) induced by 45 J/m2. cThe number of mutations in a mutant represents the total of all kinds of mutations identified in the mutant allele. Each complex mutation was counted as a single event. dD (mut/kb)–densities of mutations calculated in assumption of Poisson distribution as described in Table S15 and Text S1.