Sequence Analysis of the Internal Transcribed Spacer 2 (ITS2) from Yeast Species Within the Genus Candida
摘要：
Nucleotide sequences of the internal transcribed spacer 2 (ITS2) regions were determined for 13 species within the genus Candida, representing a collection of those species pathogenic for humans. No two species had identical sequences and the sizes of ITS2 varied fourfold, representing an apparent continuous gradient of nucleotides. When present, sequence homologies were observed in the 5' end of ITS2, and many species exhibited more limited homologies within three known conserved domains found in other yeasts. Cluster analysis of primary sequence revealed a concordance with a known taxonomic subfamily and suggests that certain species within the genus form a similar grouping. A majority of species exhibited similar presumptive RNA secondary structures, consistent with the hypothesis that these spacer regions are essential for correct processing of the 5.8S and 28S subunits.
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关键词：
Ribosomal dna-sequences Nucleotide-sequence Saccharomyces-cerevisiae Rna Patterns 8s Region Rdna
DOI：
10.1007/s002849900280
被引量：
年份：
1998
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