J.C. REVY, ISM / SCIENCE PHOTO LIBRARY J.C. REVY, ISM / SCIENCE PHOTO LIBRARY
Molecular computer graphics representation of taka amylase, an enzyme. In this image, ribbons are used to represent part of the structure; the technique is called B-spline smoothed. The amylases are a group of related enzymes that break down starch, glycogen and other polysaccharides. Plants contain both the alpha and beta types of amylases; animals possess only the alpha form, found in pancreatic secretions and (in humans) in saliva. Amylases break the long polysaccharide chains, leaving a mixture of the sugars glucose and maltose.
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