Enzymes (EC 2.7.7.x) transferring nucleotide residues (nucleotidyls) from nucleoside di- or triphosphates into dimer or polymer forms. Some n. bear specific names ( e.g., adenylyltransferases), trivial name s indicating the linkage hydrolyzed in the synthesis (pyrophosphorylases, phosphorylases), or names of the material synthesized (RNA or DNA polymerase).
Medical dictionary. 2011.