Simoncsits A, Tomasz J, Allende J E
Nucleic Acids Res. 1975 Feb;2(2):257-63. doi: 10.1093/nar/2.2.257.
A rapid and simple synthesis of pppGpN type /N equals C, U or A/ diribonucleotide derivatives is described by coupling guanosine 2', 3'-cyclic phosphate 5'-triphosphate with the appropriate ribonucleoside in the presence of ribonuclease T-1.