a 2'-deoxyribonucleoside 5'-diphosphate + dTDP => a 2'-deoxyribonucleoside 5'-phosphate + dTTP
a 2'-deoxyribonucleoside 5'-diphosphate + dtdp => a 2'-deoxyribonucleoside 5'-phosphate + dttp
a 2'-deoxyribonucleoside 5'-diphosphate + dTDP => a 2'-deoxyribonucleoside 5'-phosphate + dTTP
a 2'-deoxyribonucleoside 5'-diphosphate + dtdp => a 2'-deoxyribonucleoside 5'-phosphate + dttp