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The description on its file description page there is shown below.
The quality of this chemical structure is disputed.
The dispute is about: Wrong type of omega in the peptide angle. The different conformational possibilities of a group are not very visually distinct from constant structural details. For example, would be clearer if the "alternate" position of the amide atoms were much lighter.. Please discuss the issue on this diagram's talk page.
See also: Wikipedia chemical structure drawing guide in English or German.
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