IL-13 蛋白, Cotton Rat (His)

IL-13 protein is a cytokine involved in allergic inflammation, immune response to parasites, and B cell proliferation. IL-13 Protein, Cotton Rat is the recombinant rat-derived IL-13 protein, expressed by E. coli , with N-6*His.

IL-13 蛋白在过敏性炎症和寄生虫感染的免疫反应中发挥着关键作用。它与 IL2 协同调节干扰素-γ 合成、刺激 B 细胞增殖以及激活嗜酸性粒细胞、嗜碱性粒细胞和肥大细胞。除了其免疫功能外，IL-13 通过调节跨膜和可溶形式的 IL-1 受体样 1/IL1RL1 的产生，在控制 IL33 活性方面发挥着至关重要的作用。它展示了拮抗 Th1 驱动的促炎性免疫反应并下调各种促炎细胞因子（包括 IL1、IL6、IL10、IL12 和 TNF-α）合成的能力，部分通过抑制 NF-kappa-B 实现。IL-13 不仅作用于造血细胞，还作用于内皮细胞等非造血细胞，诱导血管细胞粘附蛋白 1/VCAM1，这对于嗜酸性粒细胞的募集至关重要。其生物学效应是通过包含IL4R链和IL13RA1链的受体介导的，激活JAK1和TYK2，最终导致STAT6的激活。除了 IL13RA1 之外，另一种受体 IL13RA2 可作为 IL-13 的高亲和力诱饵，介导细胞外 IL-13 的内化和消耗。IL-13 直接与 IL13RA2 相互作用，进一步说明其调节机制的复杂性。

Measured in a cell proliferation assay using TF-1 human erythroleukemic cells. The ED₅₀ for this effect is 0.6592 ng/mL, corresponding to a specific activity is 1.517×10⁶ U/mg.

Others

E. coli

N-6*His

AAP93198 (A19-H133)

/

APGPVPRCMSPPMALKELIEELSNITQDQRAPLCNGSMVWSVDLTAGGFCGALDSLTNISSCKPIYKTQRLLNALCTRKASVGVSRLPDTKIEVVQFITTLLNYSKQLYRCGTFH

Approximately 14 kDa

Greater than 95% as determined by reducing SDS-PAGE.

无菌粉末.

Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4, 5% trehalose, 5% mannitol and 0.01% Tween80.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer. It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.