5'-end (N(2),N(2),N(7)-trimethyl 5'-triphosphoguanosine)-guanosine(2-) residue
5'-end (n(2),n(2),n(7)-trimethyl 5'-triphosphoguanosine)-guanosine(2-) residue
A <em>N</em><small><sup>2</small></sup>,<em>N</em><small><sup>2</small></sup>,<em>N</em><small><sup>7</small></sup>-trimethyl guanosine linked via an inverted 5'-5' triphosphate bridge to an initiating guanosine; major species at pH 7.3.