Learn how to use this product Isohelix BuccalFix Plus DNA Isolation Kits are designed to provide high DNA yield and purity from buccal swabs that were stabilized in BuccalFix tubes. The kits have been fully optimized for buccal cell samples, resulting in reduced handling times, increased DNA yields, and other important technical benefits. They can be used manually in 96-well plates or other high-throughput formats.