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Description
Details
Description:Mouse monoclonal antibody to human Transforming Growth Factor beta (TGF-β)
Purification: Protein G affinity purified
Product Type:Primary antibody
Target Protein:Human TGF-β
Immunogen:TGF-βfrom human platelets
Fusion Myeloma: Sp2/0-Ag14
Specificity:Western blotting demonstrated that this antibody reacts with the dimeric (25 kDa) and monomeric (12.5 kDa.) forms of TGF-β under both non-reducing and reducing conditions respectively. This antibody recognizes both human platelet-derived and recombinant TGF-β in ELISA.
Species Reactivity: Human, others not tested.
Host / Isotype: Mouse, IgG1 Kappa
Formulation: Lyophilized in 0.01M PBS, pH 7.0.
Reconstitution:Double distilled water is recommended and to adjust the final concentration to 1.00 mg/mL.
Storage: Store at -20oC
Research Area:Growth Factors and Their Receptors, Angiogenesis
Background:
Transforming growth factor beta (TGF-β) has three isoforms (TGF-β1, TGF-β2, and TGF-β3) with similar functions.
The cytokine is a homodimer linked by disulfide bind. Inside cells, the cytokine forms a small latent complex with latent associated peptide (LAP). This small complex binds to latent TGF-β binding protein (LTBP) to be secreted to extra-cellular matrix. Disassociation of the latent proteins from TGF-β results in the release of the cytokine to its receptor. The process is called activation, which can be influenced by various factors, including proteases, metalloproteases, extreme pH, mild acidic condition, reactive oxygen species and integrins.
TGF-β is an anti-proliferation factor in normal cells. It increases the synthesis of p15 and p21, which can block the cyclin: CDK complex, and causes cells to stop at G1 phase. The cytokine can induce apoptosis through both SMAD and DAXX pathways. In cancer cells, TGF-β signaling is altered and TGF-β no longer stops cell proliferation.
Applications:
ELISA:The antibody reacts with TGF-β.
IHC: Can be used in immunohistochemcal applications.
Neutralizing:This antibody neutralizes TGF-β activity in vitro and in vivo.In an inhibition assay of CCL/64 cell growth and in a NRK-49F colony forming assay, the antibody neutralized TGF-β bioactivities. The effect of micro-injection of this antibody into one blastomere of two cell stage Xenopus embryos indicated that it was also able to neutralize the bioactivity of TGF-βin vivo.
References:
If research is published using this product, please inform Anogen in order to cite the reference on this datasheet. Anogen will provide one unit of product in the same category as gratitude.
Additional
Additional Information
| Product Specificity | mAb anti-Human TGF-β, 8C4 |
|---|---|
| Application | EIA, IHC, NT, WB |
| Size | 0.1 mg |
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A.优点：
多重分析——一次分析可以检测16种干细胞相关的TF
定量比较——二个样本的差异可以定量分析和比较
步骤简单——探针温育、柱分离、板杂交和HRP检测
无需贵重仪器——无需如Luminex那样的贵重仪器
B.原理：
干细胞转录因子活性多重检测阵列试剂用于同时检测多种TF活性。该技术中，基于TFDNA结合位点的一致性序列，制备一系列生物素标记的探针。当探针混合物与核提取物一起温育时，每个探针寻找相应的TF，形成TF/探针复合物，通过柱离心纯化可以很容易与游离探针分开。结合的探针从混合物中分离出来，通过板杂交分析。板孔中预包被上与探针互补的特异序列，捕获的DNA探针进一步用链酶亲和素-HRP检测，化学发光检测仪测定发光强度（RLUs）。
这样可不可以？
另还有几个问题：1、这样的裂解液裂解线粒体提蛋白可不可以
2、裂解液加多少剂量
3、12000g离心10min和30分钟有没有区别
一、机械裂解法主要有以下两中：
1．热休克（Thermal shock）,既反复冻溶法,是一种常用的机械裂解方式比,通常由冷冻和解冻两部分组成（freezing and thawing）,.原理：由于细胞内冰粒形成和剩余细胞液的盐浓度增高引起溶胀,使细胞结构破碎.冷冻通常在液氮或-20°C冰上进行,解冻可以在37、50、65 或100℃水浴中进热休克比化学裂解温和,但是很有效,有资料表明用热休克和溶菌酶与SDS的方法获得了90%的细胞裂解率.
2．超声波处理（Ultrasonication）既利用超声加热的方法,把细胞破碎.但这种处理会导致DNA 的断裂,所以加热不宜过剧烈,要设定好超声时间和间隙时间,一般超声时间不超过5秒,间隙时间最好大于超声时间,这些都有利于保护酶的活性.bead-beating 也是常用的机械处理方式,有报道指出bead-beating 比热休克和化学裂解的细胞裂解效果更好 虽然DNA产量较高,但通常得到的DNA片段较小.
二、 化学裂解和酶裂解法（在提核酸时联合使用）
主要是裂解液处理法,细胞裂解液的主要目的有以下几种：（1）利用去污剂破坏脂质双分子层,破裂细胞；（2）溶解蛋白；（3）蛋白变性使其稳定；（4）抑制蛋白酶活性.
主要根据不同的目的,裂解液的组成有所不同,主要有提取核酸和蛋白两中.在提取RNA或DNA时,我们主要是要充分裂解细胞,得到更多的核酸；如果我们的目的是蛋白,那要根据蛋白的位置、特性等因素考虑裂解液,在提取蛋白后,再根据实验需要复性蛋白等.以下是细胞裂解中常用试剂和其作用：
50 mM Tris-HCl pH 7.4（缓冲体系）,150 mM NaCl（等渗体系）,1 mM PMSF （强大的蛋白酶抑制剂）,1 mM EDTA（变性剂和稳定剂）,5 μg/ml Aprotinin（蛋白酶抑制剂）,5 μg/ml Leupeptin（蛋白酶抑制剂）,1% Triton x-100（破坏细胞）,1% Sodium deoxycholate（中度变性剂和蛋白溶解剂）,0.1% SDS（强变性剂和蛋白溶解剂）.7M 尿素,2M硫脲(可以提高膜蛋白的融解）,蛋白酶K等.
. 50 mM Tris-HCl pH 7.4 缓冲体系 · 150 mM NaCl 等渗体系
· 1 mM PMSF 强大的蛋白酶抑制剂 · 1 mM EDTA 变性剂和稳定剂
· 5 µg/ml Aprotinin 蛋白酶抑制剂 · 5 µg/ml Leupeptin 蛋白酶抑制剂 · 1% Triton x-100 破坏细胞
·1% Sodium deoxycholate 中度变性剂和蛋白溶解剂 ·0.1% SDS 强变性剂和蛋白溶解剂
组织裂解液和细胞裂解液如何配制
http://wenku.baidu.com/link?url=wSb7SK6U6DwRWnh4oq2PWLhYpcVp1BZQA42ybzcNGDB0xXR1HJCmuREp-ikc--tOmNYvKu-vRHAHjFz_D0eB3IZ_uEYz1AAU9X4BkluWIZW
裂解液裂解是一种比较温和的红细胞去除方法,主要用于经酶消化分散的组织细胞的分离纯化，淋巴细胞的分离纯化以及组织细胞蛋白与核酸提取等实验中红细胞的去除。经红细胞裂解液裂解得到的组织细胞中不含红细胞，可进一步用于原代培养、细胞融合、流式细胞分析、核酸与蛋白的分离和提取等。
用SDS裂解，RNA酶降解，
在过柱，后洗脱
