FIG. 6.

Detection of 5′ ends in the mtDNA of nuc1 and abf2 null strains. (A) 5′-End-labeled mtDNA samples from a-1/1R/Z1 and aori1nuc1Δ were treated and displayed as described for Fig. 1B. (B) Results of an identical experiment performed on mtDNA from strain aori1abf2Δ. H, HpaII; E, EcoRV; D, DraI.