Anion Exchange Highly pure plasmid DNA can be isolated using anion exchange technology. Anion exchange resins are positively charged and typically used in a column format. The cleared lysate is loaded onto the column, and DNA binds tightly to the resin. After a washing step, DNA is eluted from the column with a high-salt buffer. Anion exchange-based purification kits offered by QIAGEN utilize a silica-based resin densely coupled with DEAE groups. In low-salt buffers, negatively charged phosphate groups on the DNA backbone interact with the positively charged DEAE groups on the column resin. After elution and alcohol precipitation, DNA is ready for use. QIAGEN's EndoFree™ Plasmid Maxi, Mega and Giga Kits also incorporate an endotoxin removal step into the plasmid purification procedure for the most demanding downstream applications.
With all of these choices, researchers looking to save time and headaches are sure to find a DNA purification kit that suits their needs. The accompanying table lists kits available for genomic and plasmid DNA preparation, and a visit to any company's Web site will provide specific information on each product.
Anion Exchange Highly pure plasmid DNA can be isolated using anion exchange technology. Anion exchange resins are positively charged and typically used in a column format. The cleared lysate is loaded onto the column, and DNA binds tightly to the resin. After a washing step, DNA is eluted from the column with a high-salt buffer. Anion exchange-based purification kits offered by QIAGEN utilize a silica-based resin densely coupled with DEAE groups. In low-salt buffers, negatively charged phosphate groups on the DNA backbone interact with the positively charged DEAE groups on the column resin. After elution and alcohol precipitation, DNA is ready for use. QIAGEN's EndoFree™ Plasmid Maxi, Mega and Giga Kits also incorporate an endotoxin removal step into the plasmid purification procedure for the most demanding downstream applications.With all of these choices, researchers looking to save time and headaches are sure to find a DNA purification kit that suits their needs. The accompanying table lists kits available for genomic and plasmid DNA preparation, and a visit to any company's Web site will provide specific information on each product.
การแปล กรุณารอสักครู่..
