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"high contrast" CPK

The B-form of a DNA helix is shown. It includes the 10 possible base pair stacking interactions. The DNA sequence is:

BSeq

Each dinucleotide stack can be viewed using the buttons below. Right-click to change views or animate.

Dinucleotide stacks in DNA:
  AT/TA TA/AT AA/TT
  AC/TG CA/GT AG/TC
  GG/CC GC/CG CG/GC
    GA/CT  

Each chain is numbered from the 5' end. Thus, the "AT/TA" stack corresponds to nucleotides 1 & 2 of chain A and nucleotides 10 & 11 of chain B