magnesium , an ion necessary in enzymatic as well as in nonenzymatic template-directed polynucleotide-synthesizing reactions , has been found to catalyze the hydroxide ion attack on the p-n bond of selected 5'-monophosphate imidazolide derivatives of nucleotides , such as guanosine 5'-monophosphate 2-methylimidazolide ( 2-meimpg ) , guanosine 5'-monophosphate imidazolide ( impg ) , and adenosine 5-monophosphate 2-methylimidazolide ( 2-meimpa ) .
C0032550
polynucleotide
C0028630
nucleotides