Product name
Recombinant Human TNF- Alpha protein (N-6His)
Code
CD00812
Biological activity
Fully biologically active when compared to standard. The ED50 as determined by a cytotoxicity assay using Mouse L929 cells is less than 0.05 ng/ml, corresponding to a specific activity of > 2.0 × 107 IU/mg in the presence of actinomycin D.
Endotoxin
Less than 1 EU/μg of rHuTNF-α, His as determined by LAL method.
Synonyms
TNF-α, DIF-alpha, TNFA, TNFSF2, TNLG1F, TNF, Human
Sequence
MHHHHHHVRS SSRTPSDKPV AHVVANPQAE GQLQWLNRRA NALLANGVEL RDNQLVVPSE GLYLIYSQVL FKGQGCPSTH VLLTHTISRI AVSYQTKVNL LSAIKSPCQR ETPEGAEAKP WYEPIYLGGV FQLEKGDRLS AEINRPDYLD FAESGQVYFG IIAL
Uniprot Accession
Molecular Weight
Approximately 18.3 kDa, a single, non-glycosylated polypeptide chain containing 164 amino acids with Met and 6 × His at N-terminus.
Formulation
Lyophilized from a 0.2 μm filtered concentrated solution in PBS, pH 7.0.
Reconstitution
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 C. Further dilutions should be made in appropriate buffered solutions.
Background
Tumor necrosis factor alpha (TNF-α), also called cachectin, is the best-know member of the TNF-family, which can cause cell death. This protein is produced by neutrophils, activated lymphocytes, macrophages, NK cells, LAK cells, astrocytes endothelial cells, smooth muscle cells and some transformed cells. TNF-α occurs as a secreted, soluble form and as a membrane-anchored form, both of which are biologically active. The naturally-occurring form of TNF-α is glycosylated, but non-glycosylated recombinant TNF-α has comparable biological activity. The biologically active native form of TNF-α is reportedly a trimer. Human and Mouse TNF-α show approximately 79 % homology at the amino acid level and cross-reactivity between the two species. Two types of receptors for TNF-α have been described and virtually all cell types studied show the presence of one or both of these receptor types.
Storage
-20ºC
Research area
Immunology
