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They require a continuous supply of protein, iron, zinc, biotin, and vitamins D and B12 to maintain normal growth

The discovery of the ubiquitinproteasome system (UPS) in the 1980s by Hershko, Ciechanover, and Rose revolutionized our understanding of intracellular protein degradation and enabled the development of proteasome-targeted cancer therapies

Voronkov 1 , Alla V

methylcobalamin Vitamin B 12 appears to have only two functions in eukaryotes: as a cofactor for the enzymes: Methionine synthase MethylmalonylCoA mutase Sources of vitamin B12 Vitamin B 12 is in the gastrointestinal tract of animals and is then absorbed by the host animal