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Ribbon diagram (Richardson diagram) of acetylcholinesterase

The ribbon shows the overall path and organization of the protein backbone in 3D. Alpha-helices are shown as coiled ribbons or thick tubes, beta-strands as arrows, and nonrepetitive coils or loops as lines or thin tubes. Image by User:ProteinBoxBot on November 7, 2007. (Courtesy of Wikimedia Commons. Released into Public domain.)

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