QuantiTect Probe PCR + UNG Kit (200) The supplied, ready-to-use master mix contains HotStarTaq DNA Polymerase, ROX passive reference dye, and a dNTP mix in an optimized buffer. The dNTP mix includes dUTP, allowing optional treatment with UNG. The UNG enzyme is provided separately. For convenience, the master mix can be stored at 2–8°C.