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Overlapping palindromes. (a) When L ≤ h ≤ 2L − 1, the DNA segments Hi and Hj must have this structure for both of them to be 2L-palindromes centered at positions i and j, respectively. The center position of each segment is represented by a bold vertical bar. (b) Similarly, this displays the structures of Hi and Hj for both of them to be palindromes when 0 < h < L. In this illustration, q = 3.
