a ribonucleotidyl-ribonucleotide-RNA = a 3'-end 2',3'-cyclophospho-ribonucleotide-RNA + a 5'-end dephospho-ribonucleoside-RNA
a ribonucleotidyl-ribonucleotide-rna = a 3'-end 2',3'-cyclophospho-ribonucleotide-rna + a 5'-end dephospho-ribonucleoside-rna