This is an idealized alpha helix, via InsightII. The initial coloring
is blue->red N-terminus to C-terminus. The second button highlights
the C=O --- H-N i -> i+4 hydrogen bonding along the backbone in green. The third button emphasizes
that approximately every fourth (3.6th/7.2th) residue lines up on one side of the helix.
The spacefill button shows that there is no hole down the middle.
Click here for the same alpha helix in a real protein (the GCN4-DNA complex).
Click here for the idealized beta sheet.
Click here for the same beta sheet in the protein tendamistat.
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