"homogenizes" - 1 õppematerjal

Mageveekäsna Ephydatia fluviatilis populatsiooni geneetiline analüüs

Intragenomic Profiling Using Multicopy Genes: The rDNA Internal Transcribed Spacer Sequences of the Freshwater Sponge Ephydatia fluviatilis Liisi Karlep, To~nu Reintamm, Merike Kelve* Department of Gene Technology, Tallinn University of Technology, Tallinn, Estonia Abstract Multicopy genes, like ribosomal RNA genes (rDNA), are widely used to describe and distinguish individuals. Despite concerted evolution that homogenizes a large number of rDNA gene copies, the presence of different gene variants within a genome has been reported. Characterization of an organism by defining every single variant of tens to thousands of rDNA repeat units present in a eukaryotic genome would be quite unreasonable. Here we provide an alternative approach for the characterization of a set of internal transcribed spacer sequences found within every rDNA repeat unit by implementing direct sequencing methodology