2'-Deoxyuridine-5'-triphosphate disodium salt is used in conjunction with uracil DNA glycosylase to prevent carryover contamination in PCR. The dUTP is substituted for dTTP in the PCR reaction, used to study the distribution, specificity and kinetics of deoxyuridine 5?-triphosphate nucleotidohydrolase(s) (dUTPase, EC 3.6.1.23). dUTPase are important enzymes that protect cells from the incorporation of dUTP into DNA.