© 2004 by Oxford University Press
Structural stability and length of I-motif of G-quartet in DNA octaplex
Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Midori-ku, Yokohama 226-8501, Japan
To confirm that longer DNA strands with sequences gcGA[G]nAgc can from an octaplex, X-ray analyses at n>l have been performed. Several crystals of d(gcGA[G]2Agc) are obtained under different conditions. It has been found that the crystal obtained with cobalt hexamine suggests a hexaplex formation, while the crystal obtained with Mg2+ and Na+ ions suggests an octaplex formation.