PSMB9, also known as proteasome subunit beta type-9, is a member of the proteasome B-type family, also known as the T1B family, that is a 20S core beta subunit. This protein is located in the class II region of the MHC (major histocompatibility complex). Expression of this protein is induced by gamma interferon and this gene product replaces catalytic subunit 1 (proteasome beta 6 subunit) in the immunoproteasome. Source: Recombinant corresponding to aa21-219 from human PSMB9, fused to His-tag at N-terminus expressed in E.coli. AA Sequence: MGSSHHHHHH SSGLVPRGSH MTTIMAVEFD GGVVMGSDSR VSAGEAVVNR VFDKLSPLHE RIYCALSGS AADAQAVADMA AYQLELHGIE LEEPPLVLAA ANVVRNISYK YREDLSAHLM VAGWDQREGG QVYGTLGGML TRQPFAIGGS GSTFIYGYVD AAYKPGMSPE ECRRFTTDAI ALAMSRDGSS GGVIYLVTIT AAGVDHRVIL GNELPKFYDE Molecular Weight: ~23.5kD (220aa), confirmed by MALDI-TOF Enzyme Activity: Not determined. This product is recommended for use in applications that do not require a catalytically active form of the protein. Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for at least 6 months at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
