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
"RNA 3'-terminal-phosphate cyclase (GTP)"
"rna 3'-terminal-phosphate cyclase (gtp)"