摘要:
We have synthesized the diastereomeric isomers of adenylyl(3'-5')adenylyl(3'-5')adenosine (ApApA), and investigated their helical structures and hybridization properties with D-poly(U) by circular dichroism (CD) and UV melting experiments. The configuration of the 5'-end residue of ApApA has little effect on the helical structure. The configuration of the 3'-end residue has little effect on the stability of the triplex, and the chiral modifications cause complicated effects on the helical structure of ApApA and its triplex-forming ability with D-poly(U), depending on the site of the modification. (c) 2005 Elsevier Ltd. All rights reserved.