LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Archaeon enzyme. Molecular model of an enzyme from Thermoplasma acidophilum. This is the 20S proteasome. A proteasome is a complex type of proteinase (protein-digesting enzyme). The barrel-shaped structure consists of four ring layers forming a central space down the middle where the catalytic protein breakdown takes place.
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