Sign Up for a Free Account

This is an image preview.
Start a Free Account
to view the full image.

  • Nearly 3,000 illustrations, including video clips of neurologic disorders.

  • Every article is reviewed by our esteemed Editorial Board for accuracy and currency.

  • Full spectrum of neurology in 1,200 comprehensive articles.

  • Listen to MedLink on the go with Audio versions of each article.

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.)