- Efficient extraction of DNA from 40 bp to 50 kb
- Gel extraction from agarose and polyacrylamide gels
- No sodium iodide to interfere with subsequent reactions
- No shearing of large DNA fragments
QIAEX II Suspension is a suspension of silica particles to which DNA fragments bind in the presence of chaotropic salts. QIAEX II Suspension is added to solutions or solubilized agarose gel slices and binds DNA. The particles are collected by a brief centrifugation, washed, and DNA of 40 bp to 50 kb is eluted in Tris buffer or water.