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48-602MAG
Buffer Detection Kit for Magnetic Beads
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CC126
Sigma-AldrichCaspase 1, recombinant human active
Caspase 1, recombinant human active: SDB (Sicherheitsdatenblätter), Analysenzertifikate und Qualitätszertifikate, Dossiers, Broschüren und andere verfügbare Dokumente.
Caspase-1 (also known as ICE, Interleukin-1beta-Converting Enzyme) is the prototypical member of the caspase family of cysteine proteases. Caspase-1 exists in cells as an inactive 45 kDa pro-enzyme. The pro-enzyme is matured by proteolysis to yield large (20 kD) and small (10 kD) subunits. The active enzyme is a heterotetramer consisting of two large and two small subunits. To date the mechanism of regulation of caspase-1 activation is complex and poorly understood. In THP-1 cells, a large proportion of the caspase-1 is present in the inactive pro-enzyme form.
The active recombinant human caspase-1 was expressed in E. coli. The expressed caspase-1 spontaneously undergoes autoprocessing to yield the subunits characteristic of the native enzyme. The recombinant caspase-1 preferentially cleaves the substrates consisting of consensus sequence YVAD (e.g., YVAD-AFC and YVAD-pNA). The recombinant enzyme can also be used as a positive control in caspase assays or in determining the specificity of caspase substrates.
Recommended usage: 0.5-1 unit for fluorometric caspase assays and 2-4 units for colorimetric caspase assays. Optimal working dilutions must be determined by end user.
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Lyophilized. Reconstitute in 25 μL PBS containing 15% glycerol.
Partially purified recombinant caspase 3 with a full length HIS-6-tag. Approximately 10-20% caspase 1 protein. The remainder is E.Coli proteins. Approximately 0.8-2 mg total protein/U of activity; E.Coli proteins have no reactivity.
This gene encodes a protein which is a member of the cysteine-aspartic acid protease (caspase) family. Sequential activation of caspases plays a central role in the execution-phase of cell apoptosis. Caspases exist as inactive proenzymes which undergo proteolytic processing at conserved aspartic residues to produce 2 subunits, large and small, that dimerize to form the active enzyme. This gene was identified by its ability to proteolytically cleave and activate the inactive precursor of interleukin-1, a cytokine involved in the processes such as inflammation, septic shock, and wound healing. This gene has been shown to induce cell apoptosis and may function in various developmental stages. Studies of a similar gene in mouse suggest a role in the pathogenesis of Huntington disease. Alternative splicing of this gene results in five transcript variants encoding distinct isoforms.
FUNCTION: SwissProt: P29466 # Thiol protease that cleaves IL-1 beta between an Asp and an Ala, releasing the mature cytokine which is involved in a variety of inflammatory processes. Important for defense against pathogens. Cleaves and activates sterol regulatory element binding proteins (SREBPs). Can also promote apoptosis. SIZE: 404 amino acids; 45159 Da SUBUNIT: Heterotetramer that consists of two anti-parallel arranged heterodimers, each one formed by a 20 kDa (p20) and a 10 kDa (p10) subunit. The p20 subunit can also form a heterodimer with the epsilon isoform which then has an inhibitory effect. May be a component of the inflammasome, a protein complex which also includes PYCARD, CARD8 and NALP2 and whose function would be the activation of proinflammatory caspases. SUBCELLULAR LOCATION: Cytoplasm. TISSUE SPECIFICITY: Expressed in larger amounts in spleen and lung. Detected in liver, heart, small intestine, colon, thymus, prostate, skeletal muscle, peripheral blood leukocytes, kidney and testis. No expression in the brain. PTM: The two subunits are derived from the precursor sequence by an autocatalytic mechanism. SIMILARITY: SwissProt: P29466 ## Belongs to the peptidase C14 family. & Contains 1 CARD domain.
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Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
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Maintain unopened and rehydrated product at -70°C in undiluted, freeze-thaw protected, tightly sealed aliquots. Avoid repeated freeze/thaw cycles. Product stable for 6 months from date of purchased if handled appropriately.
NKp46 defines ovine cells that have characteristics corresponding to NK cells. Timothy Connelley,Anne K Storset,Alan Pemberton,Niall Machugh,Jeremy Brown,Hege Lund,Ivan W Morrison Veterinary research
42
2001
ABSTRACT: Natural killer (NK) cells are well recognized as playing a key role in innate immune defence through cytokine production and cytotoxic activity; additionally recent studies have identified several novel NK cell functions. The ability to study NK cells in the sheep has been restricted due to a lack of specific reagents. We report the generation of a monoclonal antibody specific for ovine NKp46, a receptor which in a number of mammals is expressed exclusively in NK cells. Ovine NKp46+ cells represent a population that is distinct from CD4+ and ??+ T-cells, B-cells and cells of the monocytic lineage. The NKp46+ cells are heterogenous with respect to expression of CD2 and CD8 and most, but not all, express CD16 - characteristics consistent with NK cell populations in other species. We demonstrate that in addition to populations in peripheral blood and secondary lymphoid organs, ovine NKp46+ populations are also situated at the mucosal surfaces of the lung, gastro-intestinal tract and non-gravid uterus. Furthermore, we show that purified ovine NKp46+ populations cultured in IL-2 and IL-15 have cytotoxic activity that could be enhanced by ligation of NKp46 in re-directed lysis assays. Therefore we conclude that ovine NKp46+ cells represent a population that by phenotype, tissue distribution and function correspond to NK cells and that NKp46 is an activating receptor in sheep as in other species.
Millipore’s Caspase Antibodies, proteins, and assays have been well validated and published. See below for a comprehensive list of our Caspase products, based on the expertise of Upstate & Chemicon. Weitere Informationen >>
