36.7 MB (4.6 MB compressed)
3208 x 4000 pixels
27.2 x 33.8 cm ⏐ 10.7 x 13.3 in (300dpi)
DR TIM EVANS / SCIENCE PHOTO LIBRARY DR TIM EVANS / SCIENCE PHOTO LIBRARY
Pepsin enzyme. Computer graphic of the protein- digesting enzyme pepsin. It is a protease enzyme that is secreted as part of gastric juice into the stomach in an inactive form known as pepsinogen. When it comes into contact with hydrochloric acid it is converted into the active form that hydrolyses proteins into smaller polypeptides (peptones). The molecule's backbone (blue ribbon) and individual atoms (coloured dots) are seen.
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