Human Tumor Necrosis Factor α (TNF-α) ELISA Kit

货号：	AE13959HU
样本：	Serum, Plasma, Other biological fluids
标记物：	P01375
适应物种：	Human (Homo sapiens)
应用：	Quantitative
检测方法：	Sandwich
检测限：	6.5 pg/mL
供应商：	华夏远洋
数量：	999
规格：	96T/48T

简写：TNF-α
别名：TNF; DADB-70P7.1; DIF; TNF-alpha; TNFA; TNFSF2; APC1 protein|TNF superfamily; member 2|TNF; macrophage-derived|TNF; monocyte-derived|cachectin|tumor necrosis factor alpha; TNFSF7
检测范围：15.6-1000 pg/mL
产品概述：TNFa is synthesized as a 26 kDa, type II transmembrane protein that is 233 amino acids in length. It contains a 30 amino acid (aa) cytoplasmic domain, a 26 aa transmembrane segment, and a 177 aa extracellular region. TNFa is assembled intracellularly to form a transmembrane, non-covalently-linked homotrimeric protein. The 157 aa residue soluble form of TNFa (sTNF-αis released from the C-terminus of the transmembrane protein through the activity of TNFa-converting enzyme (TACE), a membrane -bound disintegrin metalloproteinase. Rat cells known to express TNF-αinclude B cells, colonic columnar epithelial cells, NK and CD3 CD56 hepatic natural T cells, macrophages, monocytes and monocyte-derived dendritic cells, CD4 and CD8 T cells, mast cells, neutrophils, keratinocytes, plasma cells, and adipocytes.
特异性：This assay has high sensitivity and excellent specificity for detection of Human TNF-α. No significant cross-reactivity or interference between Human TNF-α and analogues was observed.
回收率：Matrices listed below were spiked with certain level of recombinant Human TNF-α and the recovery rates were calculated by comparing the measured value to the expected amount of Human TNF-α in samples.
线性：The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human TNF-α and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
稳定性：The stability of ELISA kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition. The loss rate was determined by accelerated thermal degradation test. Keep the kit at 37°C for 4 and 7 days, and compare O.D.values of the kit kept at 37°C with that of at recommended temperature. (referring from China Biological Products Standard, which was calculated by the Arrhenius equation. For ELISA kit, 4 days storage at 37°C can be considered as 6 months at 2 - 8°C, which means 7 days at 37°C equaling 12 months at 2 - 8°C).
测试原理：This assay employs a two-site sandwich ELISA to quantitate TNF-α in samples. An antibody specific for TNF-α has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and anyTNF-α present is bound by the immobilized antibody. After removing any unbound substances, a biotin-conjugated antibody specific for TNF-α is added to the wells. After washing, Streptavidin conjugated Horseradish Peroxidase (HRP) is added to the wells. Following a wash to remove any unbound avidin-enzyme reagent, a substrate solution is added to the wells and color develops in proportion to the amount of TNF-α bound in the initial step. The color development is stopped and the intensity of the color is measured.