Two rotameric forms of open ring 7-methylguanine are present in alkylated polynucleotides. - Serge Boiteux; Joël Belleney; Bernard-Pierre Roques; Jacques Laval (Nucleic Acids Res., 1984)

Ring-opened 7-methylguanine residues in DNA are a block to in vitro DNA synthesis. - Timothy R. O'Connor; Sergio Boiteux; Jacques Laval (Nucleic Acids Res., 1988)