Transcribed RNAs or PCR products are actually taken care of, ideally inside a focused laminar move hood like a biosafety hood or enclosed PCR workstation, and through the use of a devoted list of pipettes and filter ideas, if at all possible. A supplementary protocol lets optional purification of protein. https://lingjunbio.quora.com/Magnetic-Beads-FAQs-Q-How-to-avoid-nucleic-acid-degradation-when-using-biomagnetic-beads-for-nucleic-acid-extraction