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This is a spacefilling model of the epsilon subunit of the ATP synthase from E. coli. It is colored in the CPK scheme, in which oxygen is red, nitrogen is blue, carbon is gray, and sulfur is yellow. Hydrogens are not shown.

This is a backbone trace, colored by "group". The N-terminus is blue and the C-terminus is red, so one can follow the path of the polypeptide chain.

This is a "Cartoons" view, colored by Structure. The secondary structure is visible; alpha helices are colored Magenta and beta strands are colored Gold. A short 3-10 helix is colored Purple.

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