Salt-out precipitation

Take-home biotech kits that let a student or hobbyist extract visible DNA from cheek cells, fruit or saliva using dish soap, salt and rubbing alcohol — Bio-Rad's Genes in a Bottle necklace kit, Edvotek's Edvo-Kits, Carolina Biological's Distance Learning line, and miniPCR bio's classroom bundles, sold to schools and directly to consumers rather than to research labs.