The pictures in the table below represent a pictorial Ramachandran diagram, showing a
peptide corresponding to the inidcated phi,psi angles. Click on a cell to
see an enlarged version of the image and a link to the corresponding PDB file.
The alpha helix and the beta sheet are shown at the bottom at full size --
click to go directly to the pdb file.
All three of the peptide bonds in the tetrapeptide Ser-Asn-His-Trp are assigned
the indicated
phi and psi angles. The images are aligned so that the central peptide bond
is roughly in the same orientation in each panel. Conformations and images were
generated using Insight95 (Biosym) on an SGI O2. Note that the previous version
(pre 3/24/98)
was upside down -- oops.
|
Phi |
| Psi |
-180 |
-120 |
-60 |
0 |
60 |
120 |
180 |
| 180 |
|
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| 120 |
|
|
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|
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| 60 |
|
|
|
|
|
|
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| 0 |
|
|
|
|
|
|
|
| -60 |
|
|
|
|
|
|
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| -120 |
|
|
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|
-180 |
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Alpha helix: Phi = -57, Psi = -47
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Antiparallel Beta sheet: Phi = -139, Psi = 135
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Designed by J. Kahn, created by J. Kahn and R. Mehta
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