a 3'-end 3'-phospho-ribonucleotide-RNA + GTP <=> a 3'-end 2',3'-cyclophospho-ribonucleotide-RNA + GMP + diphosphate
a 3'-end 3'-phospho-ribonucleotide-rna + gtp <=> a 3'-end 2',3'-cyclophospho-ribonucleotide-rna + gmp + diphosphate
a 3'-end 3'-phospho-ribonucleotide-RNA + GTP <=> a 3'-end 2',3'-cyclophospho-ribonucleotide-RNA + GMP + diphosphate
a 3'-end 3'-phospho-ribonucleotide-rna + gtp <=> a 3'-end 2',3'-cyclophospho-ribonucleotide-rna + gmp + diphosphate