Image talk:DNAbasePairing.png
From Wikipedia, the free encyclopedia
Only factual accuracy is disputed, not NPOV, so changing to normal disputed instead of totally disputed. --68.225.251.152 08:09, 13 Feb 2005 (UTC)
Cacycle (or anyone) - what's wrong with the right side of the image? I found an incorrect double bond on the Guanine between the N and the C which has the double-bonded O. Is that the problem, and the only problem? -R. S. Shaw 04:13, 2005 Jan 24 (UTC)
- There are C's without H's, these are CH2's and should be edge-only.
- The 5 position is this CH2 and not the ring-C.
- The bonds to the bases on the right side are wrong, base and C-5 are on the same side of the sugar ring.
- The bonds to the bases connects in an odd angle to the N, N(arom/amide) bond angles are 120°.
- There is the five-valent C.
It is not easily possible to make a 2-D representation of the 3-D structure because of the two different axes of the main features (vertical the backbone, flat the bases). I would omit the sugar backbone on the right side.
I hope that helps, Cacycle 09:31, 24 Jan 2005 (UTC)
The 5-valent C is a strange rendition of a resonance structure. The N involved has a pair of free electrons. In the resonant form, two electrons from the the C=O bond move up to the O, and the free electrons on the N move to form a N=C double bond. This rendition emphasizes the resonant structure, but is a bit misleading. I think it's correct, just not very clear. I would switch to an image showing the free electron pairs. Tadrinth
