Learn how to use this product The GeneFix HP Saliva-Prep 2 DNA Isolation Kit is designed explicitly for Use With Saliva Collection Samples. It used a newly formulated precipitation technique that makes high-yield DNA isolation in excess of 100µg from 2ml of saliva quick and easy. It removes the need for solvents, columns and filtration and is well-suited for a high-throughput protocol for deepwell plates.