Eukaryotic cell expression, CART, AAV and lentivirus packaging and other related experiments require a large scale of high-quality plasmids, so we developed plasmid extraction kit to meet the requirements of plasmid extraction for clients. We could extract 100 mg grade plasmids within 5-10 working days and ensure that the endotoxin is less than1 EU/mg, the concentration is greater than 1 mg/mL and the superhelix is > 95%.