Any process involved in the maintenance of an internal steady state of ubiquitin monomers and free ubiquitin chains at the level of the cell by recycling ubiquitin from proteasome-bound ubiquitinated intermediates. [ GOC:BHF http://www.ncbi.nlm.nih.gov/pubmed/19410548 GOC:tb GOC:dph ]
This is just here as a test because I lose it