In phylogenetic studies, some trees is built based on the analysis of 16S rRDA for some taxa and on analysis of 16S rDNA for others, what is the difference?
Dear Mohamed
A very simple and usuall answer is that 16S rRNA is the piece of ribosomal RNA found in the ribosomal subunit while 16S rDNA is the DNA which encodes for this rRNA.
There is obviously no difference based on the used terminology. In addition, data for 16S rRNA gene/16S rDNA are gathered by extracting the DNA and not the RNA.
It is very easy to clone and sequence the gene for 16S rRNA vs. sequencing the rRNA itself and there would be no difference in the phylogenetic signal. Some publications may not make the proper distinction.
Hi...not to get confuse....16s rDNA encodes gene for 16s rRNA, so one is DNA and other is its product. 16s rDNA sequences is used for study.
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