Figure 7.

A Recombination-Based Model to Account for the Apparent Recombinational Equimolarity of Large Direct Repeats on the Main Mitochondrial Chromosome in Cucumber.

The model may account for the apparent recombinational equimolarity of the largest repeats in the main chromosome versus the nonequimolarity of the large 3.6-kb repeat in the small chromosomes (Figures 5 and 6). Repeats in the master circle are represented by gray and white boxes, with letters identifying their unique flanking sequences. Recombinational equimolarity is the state in which active recombination leads to near-equal concentrations of the four possible configurations for a given direct repeat.