Proteasomeactivator11Sγsubunit,pAb正品订购,其它蛋白质/抗原/多肽

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BML-PW8190-0100 100 µl
BML-PW8190-0025 25 µl
Product Specification
Alternative Name: Proteasome activator complex subunit 3
Formulation: Liquid. Antiserum containing 10mM sodium azide.
Immunogen: Synthetic peptide corresponding to aa 70-85 of human and mouse Ki autoantigen/PA28γ.
Source/Host: From rabbit.
Specificity: Recognizes human and mouse proteasome activator 11S (γ subunit). Detects a band of ~31kDa by Western blot.
Application: Immunohistochemistry
Western Blot
Shipping: SHIPPED ON BLUE ICE
Long Term Storage: -20°C
Use/Stability: Dilute with PBS, pH 7.2-7.4 containing 1% normal goat serum (if a goat anti-rabbit IgG linker antibody is to be used). Store diluted antibody at +4°C (do not freeze) and use within 1 month.
Handling: After opening, prepare aliquots and store at -20°C.
Avoid freeze/thaw cycles.
Miscellaneous/General: The proteasome is widely recognised as the central enzyme of non-lysosomal protein degradation. It is responsible for intracellular protein turnover and it is also critically involved in many regulatory processes and, in higher eukaryotes, in antigen processing. The 26S proteasome is the key enzyme of the ubiquitin/ATP-dependent pathway of protein degradation. The catalytic core of this unusually large (2000kDa, 450Å in length) complex is formed by the 20S proteasome, a barrel shaped structure shown by electron microscopy to comprise of four rings each containing seven subunits. 20S Proteasomes degrade only unfolded proteins in an energy-independent manner, whereas 26S proteasomes degrade native and ubiquitinylated proteins in an ATP-dependent manner. The native protein substrates are recognised by subunits, some with ATP binding sites, of the outer 19S caps of the 26S proteasome.A second activator which can associate with the 20S proteasome in the absence of ATP is known as PA28 or the 11S regulator. The pure PA28 activator is a complex of two alternating subunits, PA28α and PA28β, which share approximately 50% homology but also show considerable similarity (30-40%) to a nuclear protein of unknown function, the Ki autoantigen (now referred to as PA28γ). These subunits, with an apparent relative molecular weight of approximately 29kDa, form ringlike heteromeric complexes of ~200kDa possibly with an α3β3 stoichiometry. Electron microscopic studies have shown PA28 to be a ring shaped particle which, like the 19S, caps the 20S proteasome, by binding to the α-rings, at both or either end. The complex may, however, be readily dissociated. The finding that PA28 modulates the proteasome-catalysed production of antigenic peptides presented to the immune system on MHC class I molecules indicates a cellular function of this activator in antigen processing.

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