TNF-α/TNFA/TNFSF2, Mouse, Recombinant
英文名稱:TNF-α/TNFA/TNFSF2, Mouse, Recombinant
貨號: PCK055
價格: ¥780 ¥2280 ¥12880 ¥18880
產(chǎn)品信息
產(chǎn)品形態(tài) | 粉末 |
產(chǎn)品規(guī)格 | 10μg / 50μg / 500μg / 1mg |
別名 | TNFSF2;Cachectin;Differentiation-inducing factor (DIF);Necrosin;Cytotoxin;TNSF1A;TNF-a |
物種 | 小鼠 |
表達宿主 | E.coli |
序列信息 | MLRSSSQNSSDKPVAHVVANHQVEEQLEWLSQRANALLANGMDLKDNQLVVPADGLYLVYSQVLFKGQGCPDYVLLTHTVSRFAISYQEKVNLLSAVKSPCPKDTPEGAELKPWYEPIYLGGVFQLEKGDQLSAEVNLPKYL DFAESGQVYFGVIAL with polyhistidine tag at the C-terminus. |
檢索號 | P06804.29 (Mouse), P16599.1 (Rat) |
分子量 | 18.20 kDa |
表觀分子量 | 16 kDa |
標簽 | His-tag at the C-terminus |
生物活性 | Measure by its ability to induce cytotoxicity in L929 cells in the presence of actinomycin D. The ED50 for this effect is < 40 pg/mL. The specific activity of recombinant mouse TNF alpha is approximately > 2.5× 10^7 IU/mg. |
純度 | > 98% as determined by SDS-PAGE. Ni-NTA chromatography. |
內(nèi)毒素 | < 0.1 EU per 1 μg of the protein by the LAL method. |
儲存條件 | 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. |
運輸條件 | Ambient temperature or ice pack. |
有效期 | 12個月 |
制劑 | The protein was lyophilized from a 0.2 μm filtered solution containing 1 × PBS, pH 8.0. |
復融 | 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. |
背景介紹 | TNF-α is a kind of pleiotropic pro-inflammatory cytokine. It is secreted by various cells, such as adipocytes, activated monocytes, macrophages, B cells, T cells and fibroblasts. Proteolysis of the integral membrane precursor form of TNF-α from cells soluble can release homotrimeric TNF-α. TNF-α can bind with some TNF-α receptors induces apoptosis, besides, also trigger other responses depending on cell type, receptor expression, and signal transduction status. TNF-α participate in the inflammatory response. |
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Q1:官網(wǎng)的因子都是不含動物成分的么?
我們公司的因子都是重組的,是不含動物源成分的。
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Q2:細胞因子用無菌水配成了100ug/mL母液,用于實驗時,需要的終濃度為10ng/mL,可以用培養(yǎng)基直接稀釋?還是需要通過PBS(含5%海藻糖)進一步稀釋才行呢?
如果是直接做實驗,可以直接添加培養(yǎng)基進行稀釋配置。 如果是需要長時間保存的話,需要使用含載體蛋白(如0.1%BSA,10% FBS,5%HSA或5%海藻糖)的溶液進一步釋后分裝保存于-5~-20℃或者-80℃冰箱
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Q3:細胞因子加無菌水溶解后需要再次離心嗎?
加了無菌水后,如果沒有掛壁現(xiàn)象是不用離心的,如果您放置了一段時間,再次使用時是可以使用離心機離心的
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Q4:細胞因子離心前需要放置室溫嗎?
不用提前放置室溫.
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Q5:因子到貨了,里面有兩管溶液,一個是水,一個是海藻糖溶液,用哪一個稀釋呢?
1、將裝有細胞因子的管子放入小離心機內(nèi)短暫離心20~30s(離心機最大轉速即可),使附著在管壁的微量蛋白聚集在管底; 2、先用無菌水溶解因子,很少量水即可溶解因子,注意計算溶解后濃度不低于100 μg/mL; 3、用贈送的含海藻糖的PBS溶液進一步稀釋到您實驗合適的濃度即可,然后分裝后放入-20℃以下保藏; 4、因子復融重懸過程應輕柔,不可以震蕩渦旋。
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Q6:收到細胞因子產(chǎn)品用什么溶劑復融?
1、細胞因子產(chǎn)品大部分為凍干形式發(fā)貨,少部分液體形式發(fā)貨; 2、凍干粉狀態(tài)的因子產(chǎn)品需指定溶劑復溶,請參考產(chǎn)品說明書【復融】方法,按照要求使用對應溶劑溶解,大部分因子為無菌水復融,少部分需要無菌水以外的特殊溶劑溶解的產(chǎn)品則隨貨會贈送相應的復融試劑;凍干粉溶解后如您需要進一步稀釋分裝,需使用含載體蛋白(如0.1% BSA,10%FBS,5%HSA 或 5% 海藻糖)的溶液進一步稀釋后分裝冷凍保存。 3、液體形式因子產(chǎn)品不需要復溶,具體濃度詳見產(chǎn)品標簽,按照實驗需要用含載體蛋白(如0.1% BSA,10%FBS,5%HSA 或 5% 海藻糖)的溶液進一步稀釋后分裝冷凍保存即可;

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