High quality DNA and RNA play a vital role in molecular biology, biotechnology, genomics and epidemiological experiments. The quality of DNA and RNA template largely determines the accuracy of downstream PCR detection results. The quality of DNA and RNA is usually depended on the methods of DNA and RNA extraction. Commonly extraction methods used in molecular diagnostic laboratories usually include magnetic bead extraction and silica gel membrane centrifuge column. Yeasen provides complete solutions of DNA and RNA extraction based on these two methods, including related enzymes and kits.