2′,3′-Dideoxyguanosine 5′-triphosphate (ddGTP) trisodium, a member of the 2',3'-dideoxyribonucleoside 5'-triphosphates (ddNTPs), functions as a chain-elongating inhibitor of DNA polymerase, pivotal for DNA sequencing. It operates either as an inhibitor or a substrate for DNA polymerase α [1] [2] [3].