title: Template-directed synthesis on short oligoribocytidylates.
abstract: The oligonucleotides C(pC)n, n = 4, 5, 6, 7, are efficient templates for the oligomerization of guanosine-5'-phospho-2-methylimidazole (2-MeImpG). They yield oligomeric products that are substantially less regiospecific than those obtained on polycytidylate [poly(C)]. The overall distributions of products obtained on oligo(C)s are generally similar to those of products obtained on oligodeoxycytidylates [oligo(dC)s], but there are substantial differences in the ratios of isomers. The 3'-5'-linked dinucleoside monophosphate GpG efficiently initiates oligomer formation with 2-MeImpG on oligo(C) templates. The pattern of products obtained by chain extension parallels closely that of products obtained directly from 2-MeImpG, except that the former products lack the 5'-terminal phosphate group.
mesh_terms: D003597:Cytosine Nucleotides / Q000138:chemical synthesis*; D007202:Indicators and Reagents; D007700:Kinetics; D009843:Oligoribonucleotides / Q000138:chemical synthesis*; D011066:Poly C; D011131:Polyribonucleotides; D013698:Templates, Genetic
chemical_list: D003597:Cytosine Nucleotides; D007202:Indicators and Reagents; D009843:Oligoribonucleotides; D011131:Polyribonucleotides; D011066:Poly C