| abstract |
A nucleic acid base for hole transportation in DNAs which does not cause oxidative decomposition; and an artificial DNA molecule which can realize effective hole transportation in DNAs while maintaining the double spiral structure of the DNAs. Provided are: a nucleic acid which contains a benzodeazaadenine derivative base represented by the general formula (I): n n(wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 each independently represents hydrogen, amino, mono (lower alkyl) amino, di (lower alkyl) amino, hydroxy, lower alkoxy, halogeno, cyano, mercapto, lower alkylthio, or aryl; and R 7 and R 8 each independently represents hydrogen or a group bonded to phosphoric acid);n and a polynucleotide comprising the nucleic acid. |