Several different types of nucleic acids can be found circulating in human biofluids. Fragmented DNA and RNA are now routinely purified from plasma and other bodily fluids. These types of nucleic acids need to be purified from a cell-free fraction of the biofluids to ensure that the isolated nucleic acids are truly circulating and not from intact cells. In this blog post, we will learn a bit more about circulating nucleic acids (CNA) and how they can be used as biomarkers in research.

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