Abstract
Some restriction fragments of kinetoplast minicircles from several trypanosomatid species ( Leishmania tarentolae, Trypanosoma brucei, T. equiperdum, Herpetomonas muscarum, Crithidia fasciculata, but not T. cruzi) migrate anomalously on polyacrylamide gels. This behavior is probably due to a natural curvature of the helix. Bent helices appear to be a common property of kinetoplast minicircles, and may be important for minicircle function. In the case of T. equiperdum, we present evidence that each minicircle has a single bent region which resides in or near the ‘conserved sequence’.
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