Profile: Viagen Biotech Inc. supplies laboratory reagents that enable genotyping mice using tails or cultured cells without DNA preparation. We provide alkaline DNA preparation solutions. Our DirectPCR® DNA extraction system is a single-tube system for rapid preparation of DNA from mouse tails, ear pieces, yolk sac and culture cells. Crude extracts of biological samples are not compatible with many molecular biology-grade reactions such as polymerase chain reaction, in part due to inhibitors contained in crude extracts. The patent-pending simple procedure completely eliminates any solution transfer or tube-opening steps.