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Southern blot analysis of mtDNA isolated from cell suspension cultures of ecotypes Col and C24. mtDNA was digested with HindIII and EcoRV, respectively, and hybridized with oligonucleotide probes specific for the 1790 bp insertion in Col (ins-5′PS, left panel), for the 5′ part of the cox3 reading frame (cox3-3PS, middle panel) and for the region downstream of the cox3 gene (cox3-6, right panel).
