The 26S proteasome going through several conformations after being activated. The ribbon structure of the protein chain is shown in between.

The whole structure indicated in the figure is of(a) Chromosome(b) Nucleolus(c) Nucleosome(d) Proteasome

Proteasome Function

Proteasomes function like a garbage disposal & are responsible for the breakdown of damaged or unneeded proteins in cells including proteins that control cell-cycle progression & DNA repair. Watch to get an overview of the role proteasomes play in multiple myeloma. | Takeda Oncology

A primer on the Ubiquitin-proteasome System • iBiology