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In the UPS, proteins are selectively marked by ubiquitination, the covalent addition of ubiquitin (Ub) molecules to lysine residues, which signals and targets the protein for proteolytic degradation by the 26S proteasome

Most people get their vitamin B12 from milk, but the plant-based substitutes do not have high enough levels to protect adults and children from peripheral neuropathy, which is irreversible

Improper reconstitution can introduce bacterial contamination, leading to injection site infections, abscesses, or potentially life-threatening systemic infections such as sepsis

The word amino in its chemical name refers to an amino functional group attached to the quinolinium ring