New Nanopore Technique Captures Cell-Free DNA from Biological Samples Written by AZoNanoApr 7 2021 Although DNA sequencing has now turned more common, very few understand how difficult it is to extract even a single molecule of DNA from a biological sample. An illustration showing (a) how a glass tube with a tiny opening and a positive electrode, when inserted into a liquid sample and stimulated with electricity, collects cell-free DNA floating in the sample; (b) a photograph of the borosilicate glass nanopore. Image Credit: Freedman et al., 2021. Led by UC Riverside, a new study is enabling easy detection and capture of DNA from fluid samples like blood with a tiny glass tube and electric current. The technique has been explained in the