Abstract
In this study, we have sequenced more than 100 clones of minicircle DNA from Herpetomonas samuelpessoai. An unusual amplification approach was developed to amplify minicircle DNA by using a pair of complementary primers designed from a universal stretch of minicircle sequence. Sequence analysis shows that the kinetoplast minicircles in Herpetomonas with a size of 1.3 kb are organised into two conserved regions and two variable regions which are located 180 degrees apart. The potential gRNA genes are encoded in variable regions of minicircle approximately 360 bp from CSB-3 (conserved sequence block 3). A conserved upstream sequence located 30 nt before the gRNA genes was identified and is related to the gRNA genes in sequence organisation. A potential role(s) of this sequence in gRNA transcription is discussed.
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