- SynonymGalectin-9,LGALS9,Ecalectin
- SourceHuman Galectin-9, His Tag (LG9-H5244) is expressed from human 293 cells (HEK293). It contains AA Ala 2 - Thr 323 (Accession # O00182-2).Predicted N-terminus: HisRequest for sequence
- Molecular Characterization
This protein carries a polyhistidine tag at the N-terminus.
The protein has a calculated MW of 36.6 kDa. The protein migrates as 45-55 kDa under reducing (R) condition (SDS-PAGE).
- EndotoxinLess than 1.0 EU per μg by the LAL method.
- Purity
>95% as determined by SDS-PAGE.
- Formulation
Lyophilized from 0.22 μm filtered solution in 20 mM MOPS, 50 mM NaCl, 1 mM EDTA, 2 mM DTT, pH7.4. Normally trehalose is added as protectant before lyophilization.
Contact us for customized product form or formulation.
- Reconstitution
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
- Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
Human Galectin-9, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.
- BackgroundGalectin-9 (LGALS9) is also known as tumor antigen HOM-HD-21 and ecalectin. Galectins are a family of proteins defined by their binding specificity for β-galactoside sugars, such as N-acetyllactosamine (Galβ1-3GlcNAc or Galβ1-4GlcNAc), which can be bound to proteins by either N-linked or O-linked glycosylation. As for Galectin-9, it has high affinity for the Forssman pentasaccharide, and it is also the ligand for HAVCR2/TIM3. Forthermore, Galectin-9 stimulates bactericidal activity in infected macrophages by causing macrophage activation and IL1B secretion which restricts intracellular bacterial growth.
- References
Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.
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不知单纯使用冰浴中超声裂解够了吗?还是说要选用裂解液呢?最主要的就是我不知道该怎么赔这个裂解液,使其COX活性不产生影响
样品处理:
a. 植物组织:取新鲜或-70℃冻存100mg组织在液氮中研磨,把粉末加入到1ml裂解液中混匀。
b. 动物组织:取新鲜或-70℃冻存100mg组织加1ml裂解液,用组织研磨杵或匀浆器匀浆处理。
c. 贴壁细胞:直接在培养板中加入裂解液裂解细胞,每106细胞加1ml 裂解液。用取样器吹打混匀。
d. 细胞悬液:离心收集细胞。每106动物、植物和酵母细胞或每107细菌细胞加1ml裂解液混匀。
e. 血液处理:取0.2-1ml新鲜血液加3倍体积红细胞裂解液,混匀后室温放置10分钟,10000rpm离心1分钟。弃上清,若沉淀含有红细胞,可加入2倍体积红细胞裂解液重复裂解步骤。离心后沉淀加入1 ml裂解液混匀。
将处理后的样品在室温放置5分钟,使得核酸蛋白复合物完全分离。
向匀浆样品中加0.2ml氯仿,盖好管盖,剧烈振荡15秒,室温放置3-5分钟。
2-8℃ 12000 rpm离心10分钟。RNA主要在上层无色的水相中,把水相转移到新管中,不要吸到沉淀。
吸附柱前处理:在吸附柱中加入500ul 洗柱液,室温放置2分钟,2-8℃ 12,000 rpm离心2min,弃废液。6. 第4步收集的上清中加入200ul无水乙醇混匀,加入吸附柱静置2分钟,2-8℃ 12000rpm离心2min,弃废液。7. 向吸附柱中加入600ul漂洗液(使用前请先检查是否已加入无水乙醇),2-8℃ 12,000 rpm离心2min,弃废液。8. 向吸附柱中加入600ul漂洗液,2-8℃ 12,000 rpm离心2min,弃废液。9. 12000rpm离心2min,弃掉收集管,将吸附柱置于室温放置数分钟将吸附柱中残余的漂洗液去除。10. 将吸附柱放入新管中,向膜中央滴加50-100ul RNase free ddH2O,室温放置5min,12000rpm室温离心2min即得到RNA。
注意事项:
所有相关器皿耗材都应为RNase-free产品,操作过程要小心,带口罩、手套避免环境中RNA酶污染样品。
RNA在水溶液中OD值可能在1.5-1.9之间,但这并不表示RNA不纯,需电泳检测。
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)。
【2】加入裂解液后可以加用超声破碎细胞。
【3】提完细胞的器具可以在显微镜下看一下,剩余的细胞还多不多。如果还多,说明细胞提取的不彻底,还要改进方法,争取提取的细胞彻底一些。
(仅供参考)
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