 In particular, proteasome subunit beta type-2, along with other beta subunits, assemble into two heptameric rings and subsequently a proteolytic chamber for substrate degradation.The eukaryotic proteasome recognizes degradable proteins, including damaged proteins for protein quality control purpose or key regulatory protein components for dynamic biological processes.The gene "PSMB3" encodes a member of the proteasome B-type family, also known as the T1B family, that is a 20S core beta subunit.