产品详情
产品信息
产品规格 | 50μg / 10μg |
表达宿主 | E.coli |
序列信息 | MGPVPPSTALRELIEELVNITQNQKAPLCNGSMVWSINLTAGMYCAALESLINVSGCSAIEKTQRMLSGFCPHKVSAGQFSSLHVRDTKIEVAQFVKDLLLHLKKLFREGRFN with polyhistidine tag at the C-terminus |
检索号 | P35225.2 |
分子量 | 13.28 kDa |
表观分子量 | 15 kDa |
标签 | His-tag at the C-terminus |
生物活性 | Measure by its ability to induce TF-1 cells proliferation. The ED50 for this effect is < 0.8 ng/mL. The specific activity of recombinant human IL-13 is approximately > 1 × 10^6 IU/ mg. |
纯度 | > 95% as determined by SDS-PAGE. Ni-NTA chromatography. |
内毒素 | < 0.1 EU/μg |
制剂 | The protein was lyophilized from a 0.2 μm filtered solution containing 1 × PBS, pH 8.0. |
复融 | It is recommended to reconstitute the lyophilized protein in sterile water to a concentration not less than 100 μg/mL. Do Not Vortex! Vigorous shaking may impair the biological activity of the protein. |
储存条件 | Lyophilized protein should be stored at -5~-20℃ for 1 year. Upon reconstitution, store at 2-8℃ for up to 1 week. Further dilute in a buffer containing a carrier protein or stabilizer (e.g. 0.1% BSA, 10% FBS, 5% HSA or 5% trehalose solution), protein aliquots should be stored at -5~-20℃ or -80℃ for 3-6 months. |
运输条件 | Ambient temperature or ice pack. |
有效期 | 12个月 |
背景介绍 | Interleukin 13 (IL-13) is a protein that in humans is encoded by the IL13 gene. IL-13 was first cloned in 1993 and is located on chromosome 5q31 with a length of 1.4kb. It has a mass of 13 kDa and folds into 4 alpha helical bundles. The secondary structural features of IL-13 are similar to that of Interleukin 4 (IL-4); however it only has 25% sequence homology to IL-4 and is capable of IL-4 independent signaling. IL-13 is a cytokine secreted by T helper type 2 (Th2) cells, CD4 cells, Natural killer T cell, Mast cell, Basophil cells, Eosinophil cells and Nuocyte cells. Interleukin-13 is a central regulator in IgE synthesis, goblet cell hyperplasia, mucus hypersecretion, airway hyperresponsiveness, fibrosis and chitinase up-regulation. It is a mediator of allergic inflammation and different diseases including asthma. |
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