5'-end purine ribonucleotide 5'-triphosphate(4-) residue
5'-end purine ribonucleotide 5'-triphosphate(4-) residue
An organic anionic group obtained by deprotonation of the triphosphate OH groups of any 5'-end purine ribonucleotide 5'-triphosphate residue; major species at pH 7.3.