ubiquitin protein molecule, 3d rendering. ubiquitin is a molecular tag that indicates proteins marked for recycling. cartoon &

pdb1ubq amino acid apoptosis atoms biochemical biochemistry biotech biotechnology breakdown chain chemical chemistry crystal structure eukaryotic immunopoietic macromolecule modification molecular molecule nobel prize peptide polymer posttranslational proteasome protein proteolysis proteomics recycling sheet strand tag ubiquitin ubiquitous polypeptide science scientific disease health model 3d rendering illustration