Molecular model of ubiquitin-conjugating enzyme complexed with ubiquitin. Ubiquitin is found in all eukaryotic cells. When a protein is damaged or old it will be tagged by several ubiquitin molecules. The protein is then moved to a proteosome,a hollow barrel shaped protein that degrades other proteins into amino acids and small polypeptides. Ubiquitin-conjugating enzymes play a role in the tagging of proteins for degradation | |
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Crédit: | Science Photo Library / Laguna Design |
Taille de l’image : | 4180 px × 4180 px |
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