TIL cells contain a protein machine, called the proteasome, which takes misfolded proteins that can't be refolded and breaks them into smaller subunits. It is part of a system called the ubiquitin–proteasome, where ubiquitins detects the misfolded proteins and sends them to the proteasome.

https://en.wikipedia.org/wiki/Proteasome
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1g94bpm/til_cells_contain_a_protein_machine_called_the/