活性重组蛋白 Recombinant Human IL-12A / IL-12 p35 / CLMF / NFSK / NKSF1 / IL12A Protein　重组蛋白

研究方向

IL-35 蛋白在免疫调节中发挥着关键作用，具有多功能性。它与 IL12B 异二聚化形成 IL-12 细胞因子，或与 EBI3/IL27B 异二聚化形成 IL-35 细胞因子。IL-12 主要由 B 细胞、树突状细胞、巨噬细胞和粒细胞等专业抗原呈递细胞产生，是先天抵抗和适应性免疫之间的重要纽带，调节 T 细胞和自然杀伤细胞反应，同时诱导干扰素-γ 的产生并有利于 T 辅助细胞 1 细胞的分化。从机制上讲，IL-12 通过由 IL12R1 和 IL12R2 亚基组成的受体发挥作用，导致细胞底物的酪氨酸磷酸化，并随后通过招募的磷酸化 STAT4 来调节细胞因子/生长因子响应基因。在 IL-35 的背景下，IL-35 对维持肝脏微环境中的免疫稳态有显着贡献，并作为免疫抑制细胞因子发挥作用。值得注意的是，IL-35 通过由 IL12RB2 和 gp130/IL6ST 异二聚体或同二聚体组成的非常规受体介导其作用，需要转录因子 STAT1 和 STAT4 进行信号传导。此外，IL-35 与 NBR1 相互作用，促进 IL-12 分泌。具有 EBI3/IL27B 的 IL-35 异二聚体（称为白细胞介素 IL-35）不是二硫键连接的，这与具有 IL12B 的二硫键连接的 IL-12 异二聚体不同。

生物活性

Measured by its ability to induce IFN-gamma secretion in NK-92 human natural killer lymphoma cells, the concentration of Recombinant Human IL‑12p35 (C96S) Monomer that produces 50% of the response is 0.300-3.00 ng/mL when Recombinant Human IL‑12p40 Monomer is present at 0.25 µg/mL.

种属

Human

表达宿主

HEK293 cells

Calculated MW

49.33 kDa

Observed MW

70 kDa

标签

C-hFc&His

纯度

> 95% by SDS-PAGE.

内毒素

< 0.1 EU/μg of the protein by LAL method.

制剂

Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4.Contact us for customized product form or formulation.

描述

Recombinant Human IL-12A/IL-12 p35 Protein is produced by HEK293 expression system. The target protein is expressed with sequence (Arg23-Ser219) of human IL12A/NKSF1 (Accession #NP_002178.2) fused with an Fc, 6×His tag at the C-terminus.

储存

Store at -20℃.Store the lyophilized protein at -20℃ to -80 ℃ up to 1 year from the date of receipt.
After reconstitution, the protein solution is stable at -20℃ for 3 months, at 2-8℃ for up to 1 week.未开盖的干粉蛋白在 -20°C至-80°C可保存12个月；
复溶之后，蛋白溶液在-20°C及以下可保存3个月，在2-8℃可保存1周。

复溶

Centrifuge the vial before opening. Reconstitute to a concentration of 0.1-0.5 mg/mL in sterile distilled water. Avoid vortex or vigorously pipetting the protein. For long term storage, it is recommended to add a carrier protein or stablizer (e.g. 0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose), and aliquot the reconstituted protein solution to minimize free-thaw cycles.收到重组蛋白产品之后请检查蛋白冻干粉末是否贴于瓶底，如果粉末浮起，开盖之前请先低温离心。将蛋白用说明书中指定的缓冲液复溶至0.1-0.5 mg/mL（请注意蛋白复溶浓度不能低于0.1 mg/mL），室温平衡5-10 min保证充分溶解，复溶过程中请不要剧烈涡旋及吹打蛋白溶液。如需长期储存，建议复溶时添加载体蛋白或者稳定剂（如0.1% BSA, 5% HSA, 10% FBS 或者 5% 海藻糖），同时将复溶后的蛋白溶液按照需求进行分装，储存于-20°C至-80°C，随取随用，避免反复冻融。

背景信息

Interleukin-12 subunit alpha (IL12A/IL-12p35) is also known as Cytotoxic lymphocyte maturation factor 35 kDa subunit, cytotoxic lymphocyte maturation factor 1, p35, NK cell stimulatory factor chain 1, and interleukin-12 alpha chain. IL12A/IL-12p35 is a subunit of a cytokine that acts on T and natural killer cells, and has a broad array of biological activities. The cytokine is a disulfide-linked heterodimer composed of the 35-kD subunit encoded by this gene, and a 40-kD subunit that is a member of the cytokine receptor family. This cytokine is required for the T-cell-independent induction of interferon (IFN)-gamma, and is important for the differentiation of both Th1 and Th2 cells. The responses of lymphocytes to this cytokine are mediated by the activator of transcription protein STAT4. Nitric oxide synthase 2A (NOS2A/NOS2) is found to be required for the signaling process of this cytokine in innate immunity.

基因ID

3592

Swiss Prot

P29459

别名

P35; CLMF; NFSK; NKSF1; IL-12A;IL12A