Figure 2.

A. MtDNA sequence electropherograms showing variations in consecutive C-stretch at np 303–310 of the D-loop region obtained from the three subtypes of the epithelial ovarian neoplasms (a) C₆TC₆ and (b) C₇TC₅ sequences from stage I of endometrioid tumor; (c) C₇TC₆ and (d) C₈TC₆ sequences from stage I of mucinous tumor; (e) C₉TC₆ sequence obtained from stage III of mucinous tumor; (f) C₁₀TC₆ sequence from stage III of serous tumor. Interestingly, the C-stretch instability at np 303–315 was observed in 97% of our study samples. B. Sequence electropherograms showing the mtDNA instability at np (a) 309insCT in stage II of endometrioid tumor and (b) 310insTC observed only in early stages of serous subtype in this study. Arrow shows the unique 309insCT and 310insTC patterns respectively.