Dideoxyribonucleotide triphosphate (ddNTP): A modified dNTPplugin-autotooltip__default plugin-autotooltip_bigDeoxyribonucleotide triphosphates (dNTPs): the collective name for four different molecules (dGTP, dATP, dTTP, dCTP) that are substrates for DNA polymerase and are used to form DNA. These are sometimes abbreivated as “deoxynucleotides” (which clearly refers to dNTPs) or just that functions as a chain terminator in Sanger sequencingplugin-autotooltip__default plugin-autotooltip_bigSanger sequencing: an older DNA sequencing technology invented in 1977 by Fredrick Sanger.. Includes ddGTP, ddATP, ddTTP, and ddCTP.