Provided below are ELISA kits targeting proteasome subunit beta 1, a human protein encoded by PSMB1. This protein is 241 amino acids long, with a mass of 26.5 kDa, and is a member of the Peptidase T1B family. This is reported to be a cytoplasmic and nuclear protein. It is also an enzyme classified as a(n) proteasome endopeptidase complex. Glycosylation sites have been reported. Other alias names for this protein include: proteasome subunit beta type-1, macropain subunit C5, multicatalytic endopeptidase complex subunit C5, proteasome (prosome macropain) subunit beta type 1, proteasome component C5, proteasome gamma chain, and proteasome subunit HC5.