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PRE1 | Beta 4 subunit of the 20S proteasome; localizes to the nucleus throughout the cell cycle; Belongs to the peptidase T1B family. (198 aa) | ||||
PRE2 | Beta 5 subunit of the 20S proteasome; responsible for the chymotryptic activity of the proteasome; Belongs to the peptidase T1B family. (287 aa) |