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