A deoxyribonucleotidyltransferase that is used by molecular biologists to add a homopolymer tail, e.g., polydeoxyadenylate, to each end of a vehicle DNA. The enzyme is then used to add poly T tails to a passenger DNA. The passenger and vehicle are then annealed via their complementary termini, ligated, and cloned. See Chronology, 1972, Lobban and Kaiser.
Subjects: Genetics and Genomics.