Parallel (reverse Watson-Crick) G:C base pair (left). Compare to normal antiparallel Watson-Crick G:C (right). Hydrogen bonds are indicated by the green dotted lines, although the hydrogens themselves are not shown. The exocyclic N2 amino group of G15 is the H-bond donor to N3 of C48. N1 imino hydrogen of G15 is donated to N3 of C48.

Show the H-bonds for this base pair on the 3-D structure: <>
Show only the tertiary interaction region: <>

Show only theG15-C48 base pair with H-bonds: <>

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Nucleotide numbering help.