The DNA is then precipitated by adding isopropanol for the substantial-focus salt Option. This forces the big genomic DNA molecules outside of solution, although the smaller RNA fragments continue to be soluble. The insoluble DNA is then pelleted and separated from salt, isopropanol and RNA fragments through centrifugation. Check out https://magnetic-beads-rna-isolat59360.get-blogging.com/30180042/a-review-of-isolation-of-trace-rna