pyrophosphorylases

py·ro·phos·phor·yl·as·es

(pī'rō-fos-fōr'il-ās'ĕz),
Trivial name applied to the nucleotidyltransferases that catalyze the transfer of the AMP of ATP to another residue with the release of inorganic pyrophosphate, or the attachment of a nucleoside pyrophosphate to a polynucleotide with release of inorganic orthophosphate.