Biochemical identification of cutaneous leishmanias by analysis of kinetoplast DNA. II. Sequence homologies in Leishmania kDNA - PubMed (original) (raw)
Biochemical identification of cutaneous leishmanias by analysis of kinetoplast DNA. II. Sequence homologies in Leishmania kDNA
D E Arnot et al. Mol Biochem Parasitol. 1981 May.
Abstract
Kinetoplast DNA (kDNA) has been isolated from the human cutaneous Leishmania isolates, L. tropica major, L. aethiopica and an unknown Kenyan isolate, Leishmania SP48. DNA sequence relationships among these isolates have been studied by restriction enzyme digestion and two phase hybridisation to Southern blots of kDNA covalently coupled to diazobenzyloxymethyl (DBM) paper. The results of this analysis confirm that rapid kDNA sequence evolution is occurring in the Old World leishmanias although some sequence conservation in defined regions of the mini-circle sequence is present. These results emphasise the danger of constructing a rigid Leishmania classification on buoyant density data alone. The covalent binding of kDNA electrophoretic separations to DBM paper permits the construction of a DNA sequence "library' which can be used in the classification and diagnosis of unknown Leishmania isolates.
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