Last modified on 23 May 2001.

Online Figure 3. Chemical drawings of A:G and A:A base-pairing conformations. The given names are used in the text; other names used for the conformations are given in parentheses, with the abbreviations used in the base-pair frequency tables in bold. The A:A sheared and imino conformations are equivalent to the A:G sheared and imino conformations, respectively, since their backbone and base orientations are very similar.

  1. G:A sheared base-pair (S; G:A N3-amino, amino-N7 base-pair; Burkard et al., 1999b).
  2. A:A sheared base-pair (A3; A:A N3-amino base-pair; Nagaswamy et al., 2000).
  3. G:A imino base-pair (I; G:A carbonyl-amino, imino-N1 base-pair; Burkard et al., 1999b).
  4. A:A imino-like base-pair (A1; A:A N1-amino base-pair; Nagaswamy et al., 2000).
  5. G:A+ carbonyl-amino, N7-N1 base-pair (Nagaswamy et al., 2000).
  6. A:A N7-amino base-pair (A7-1; A:A N7-amino, amino-N1 base-pair; Burkard et al., 1999b).
  7. A:A N1-amino symmetric base-pair (A:A N1-amino, amino-N1 base-pair; Burkard et al., 1999b).
  8. A:A N7-amino symmetric base-pair (A7; A:A N7-amino, amino-N7 base-pair; Burkard et al., 1999b).
  9. A:G N3-amino base-pair (G3; highly twisted; nonplanar).
  10. A:G N1-amino base-pair (G1; highly twisted; nonplanar).
  11. A:G N7-amino base-pair (G7).