Protocol for preparing SPRI beads 100x cheaper than the commercial AMPure XP.Based on DeAngelis et al. (1995) and online protocols:https://s3-us-west-2.amazonaws.com/oww-files-public/1/17/Serapure_bead_recipe.pdfhttps://s3-us-west-2.amazonaws.com/oww-files-public/f/f8/SPRI_buffers_v2_2.pdf