The supernatant is made up of non-specific cells and particles which can be discarded, leaving only your pure goal cells connected into the bead. For sake of clarity, a dashed line has become superimposed being a reference. Time is specified in mm:ss structure and 00:00 corresponds to Preliminary magnets placement https://www.quora.com/profile/Even-Sa/Free-Nucleic-Acid-Extraction-by-Magnetic-Bead-Method-Home-https-www-lingjunbio-com-Technology-Sharing-https-w