PBC1 (PROTEASOME BETA SUBUNIT C1); peptidase/ threonine-type endopeptidase; 20S proteasome beta subunit PBC1 truncated protein (PBC1) ; The proteasome is a multicatalytic proteinase complex which is characterized by its ability to cleave peptides with Arg, Phe, Tyr, Leu, and Glu adjacent to the leaving group at neutral or slightly basic pH. The proteasome has an ATP-dependent proteolytic activity (204 aa)