Competitive reconstitution of BPDE-damaged DNA. Comparison of effect of different levels of BPDE damage on 214-bp 5S rRNA gene fragment reconstitution. Lanes: 1–4, free DNA:core particle ratio of 0.5:1; 5–8, free DNA:core particle ratio of 1:1; 9–12, free DNA:core particle ratio of 2:1. BPDE dose levels are indicated above each lane. Rec., approximate area used to calculate reconstituted fraction of 5S DNA; Free DNA, approximate area used to calculate DNA fraction of 5S DNA. Multiple bands in reconstituted region are discussed in legend to Fig. 3.