obsolete ubiquitin-independent protein catabolic process via the multivesicular body sorting pathway (obsolete GO:0090611)
OBSOLETE. The chemical reactions and pathways resulting in the breakdown of a protein or peptide, via the multivesicular body (MVB) sorting pathway; proteins are sorted into MVBs, and delivered to a lysosome/vacuole for degradation. This process is independent of ubiquitination.