Figure 1. Distribution of mutations in nfxB.

The position of all mutations detected in nfxB among 240 Cip^r clones derived independently from different genetic backgrounds or treatment with mutagens is plotted. (A) The number of base substitutions (blue bars) and 1-bp deletions and insertions (red bars) detected at each nucleotide position of the open reading frame is shown. (B) >1-bp deletions (red bars) and duplications (blue bars) are displayed over the open reading frame (black bar) and promoter region (grey bar) of nfxB.