Ribosomal DNA (rDNA) of plants is present in high copy number and shows variation between and within species in the length of the intergenic spacer (IGS). The 45S rDNA of flowering plants includes the 5.8S, 18S and 25S rDNA genes, the internal transcribed spacer (ITS1 and ITS2), and the intergenic spacer 45S-IGS (25S-18S). This study identified six different types of 45S-IGS, A to F, which at 3...

BACKGROUND & OBJECTIVE Cystic echinococcosis (CE) has a wide host range and distinct entities, not only reflected phenotypically but also by genotypic variation. Considering this fact, this study was undertaken to characterize the Indian isolates of Echinococcus granulosus to find out difference between Indian cattle, buffalo and sheep isolates on the basis of random amplification of polymorphi...

The structure of the internal transcribed spacer 2 (ITS2) in Schizosaccharomyces pombe was re-evaluated with respect to phylogenetically conserved features in yeasts, features in other transcribed spacer regions as well as the binding of transacting factors which potentially play a role in ribosomal maturation. Computer analyses and probes for nuclease protection indicate a very simple core str...