ubiquitin chain

Ubiquitin chains are like molecular tags attached to proteins inside cells. These tags help the cell decide what to do with the tagged protein—whether to recycle it, repair it, or alter its activity. Ubiquitin molecules are small proteins that can attach to other proteins in chains, and the structure of these chains determines the protein’s fate. Think of it as a signaling system that manages protein life cycles, maintaining the cell’s health and function efficiently.