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 <=> a 2'-deoxyribonucleoside 5'-diphosphate + dtdp