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.

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

This is a "Cartoons" view, colored by Structure. The secondary structure is visible; alpha helices are colored Magenta and beta strands are colored Gold.

Next: View the Hydrogen bonding

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