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The analysis of the number and length of the long repeats identified from Stephania tetrandra, Stephania japonica and Stephania kwangsiensis chloroplast genomes. The type of long repeats contains forward (F), palindromic (P), reverse (R) and complement (C). The hamming distance of 3, the minimal repeats of 30 and the maximum repeats of 50 were applied during the calculating process
