the furanose ring of the central nucleoside ( e.g. , a ) when linked to a pyrimidine nucleoside via the 2'-5'-linkage shows a higher preference for the 2e pucker conformation ( e.g. , aug , auu , acg , ca . 80 % ) than those linked to a guanosine nucleoside through the same type of bond ( agu , agg , agc , ca . 70 % ) .
C0034287
pyrimidine nucleoside
C0028621
nucleoside