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活性验证

Recombinant Human CXCL12/SDF-1 Protein (RP01637)

Recombinant Human CXCL12/SDF-1 Protein was determined by SDS-PAGE with Coomassie Blue, showing a band at 12 kDa.

Recombinant Human CXCL12/SDF-1 Protein chemoattract MOLT4 cells. The ED50 for this effect is 11.47-45.86 ng/mL, corresponding to a specific activity of 2.18×104 ~8.72×104 units/mg.

All(2)|
货号: RP01637

促销价:   ¥1250
货    期:现货产品
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详细信息

种属
Human
表达宿主
Pichia
Calculated MW
7.96 kDa
Observed MW
12 kDa
标签
NO-tag
纯度
> 95% by SDS-PAGE.
内毒素
<0.1EU/μg
制剂
Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4.
描述
Recombinant Human CXCL12/SDF-1 Protein is produced by Pichia expression system. The target protein is expressed with sequence (Lys22-Lys89) of human CXCL12/SDF-1 (Accession #NP_954637.1.) fused with no additional amino acid.
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。
生物活性
Measured by its ability to chemoattract MOLT4 cells. The ED50 for this effect is 11.47-45.86 ng/mL, corresponding to a specific activity of 2.18×104 ~8.72×104 units/mg.
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。

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背景信息

Acts as a positive regulator of monocyte migration and a negative regulator of monocyte adhesion via the LYN kinase. Stimulates migration of monocytes and T-lymphocytes through its receptors, CXCR4 and ACKR3, and decreases monocyte adherence to surfaces coated with ICAM-1, a ligand for beta-2 integrins. SDF1A/CXCR4 signaling axis inhibits beta-2 integrin LFA-1 mediated adhesion of monocytes to ICAM-1 through LYN kinase. Inhibits CXCR4-mediated infection by T-cell line-adapted HIV-1. Plays a protective role after myocardial infarction. Induces down-regulation and internalization of ACKR3 expressed in various cells. Has several critical functions during embryonic development; required for B-cell lymphopoiesis, myelopoiesis in bone marrow and heart ventricular septum formation. Stimulates the proliferation of bone marrow-derived B-cell progenitors in the presence of IL7 as well as growth of stromal cell-dependent pre-B-cells (By similarity).

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