5'-(N(7)-methyl 5'-triphosphoguanosine)-(purine-ribonucleotide)(2-) residue
5'-(n(7)-methyl 5'-triphosphoguanosine)-(purine-ribonucleotide)(2-) residue
A 7-methyl guanosine (m7G) linked via an inverted 5'-5' triphosphate bridge to an initiating purine ribonucleotide