B-DNA Structure for Molecular Biology  Show the: DNA, only. Water molecules in: Major groove.  Minor groove.  Whole complex.Rotate:   X 90°   X -90°  Y 90°   Y -90°Distances:   DNA, one turn  (length in Å units)  DNA, diameter  (width in Å units)  Reset
The B-Form DNA Structure. The "Dickerson Dodecamer" is shown using the Ball & Stick display. The 5' and 3' ends of each chain are labeled.
View an A-T or G-C base pair: An A-T base pair (distance in Å between C^1' carbons). Remove distances.
Number the adenine and thymine ring positions. A G-C base pair (distance in Å between C^1' carbons).
Number the guanine and cytosine ring positions. A G-C base pair (dot surface) above an A-T base pair (Spacefill).
Place any of the above base pairs in the original double helix.

Viewing tips:

• Use the buttons to the right of the image to show only portions of the structure; then use the Chime menu to display or color the molecule. The rotate buttons act on the entire structure. Remove the distance monitors with a second click.
• On this and other pages that display DNA structures, the nucleotides can be identified by choosing Shapely under the Chime Colors menu. The Shapely colors for DNA are:
                     Go to the one-page display of one of these structures: