Human IL-4 Protein, premium grade
分子别名(Synonym)
IL4,BCGF1,BSF1
表达区间及表达系统(Source)
Human IL-4, premium grade (IL4-H4218) is expressed from human 293 cells (HEK293). It contains AA His 25 - Ser 153 (Accession # P05112-1).
Predicted N-terminus: His 25
该产品在严格的质量控制体系下生产,执行包括无菌检测和内毒素检测在内的全方位测试;其性能经过严谨验证,可完全兼容细胞培养及早期临床前阶段的其他应用场景。GMP-L04H26是IL4-H4218蛋白的GMP版本,二者具有完全一致的性能表现(注:GMP版符合临床级生产规范),确保终端用户从临床前研究向后期临床试验阶段实现无缝转换。
蛋白结构(Molecular Characterization)

This protein carries no "tag".
The protein has a calculated MW of 15.0 kDa. The protein migrates as 19 kDa±3 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素(Endotoxin)
Less than 0.01 EU per μg by the LAL method / rFC method.
宿主蛋白残留(Host Cell Protein)
<0.5 ng/µg of protein tested by ELISA.
宿主核酸残留(Host Cell DNA)
<0.02 ng/μg of protein tested by qPCR.
无菌(Sterility)
Negative
支原体(Mycoplasma)
Negative
纯度(Purity)
>95% as determined by SDS-PAGE.
>95% as determined by SEC-HPLC.
制剂(Formulation)
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
Contact us for customized product form or formulation.
重构方法(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.
存储(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.



背景介绍
白细胞介素-4(IL-4)作为关键细胞因子,可诱导初始辅助T细胞(Th0)向Th2细胞分化,并在Th2型免疫应答(如过敏反应及寄生虫感染)中与IL-13协同驱动巨噬细胞发生替代性活化。该细胞因子作为IL-4受体(IL-4R)的核心配体,因IL-4R亦可结合IL-13导致二者功能存在显著重叠;其信号转导依赖于信号转导与转录激活因子6(STAT6)这一核心枢纽。最新研究发现,在Itk(IL-2诱导T细胞激酶)、KLF2(Krüppel样因子2)、CBP(CREB结合蛋白)及Id3(DNA结合抑制因子3)等基因缺陷小鼠模型中,IL-4无需抗原预先刺激即可在胸腺内调控先天性CD8⁺T细胞的发育进程。
关键字: IL-4;IL-4蛋白;IL-4重组蛋白;ACRO;百普赛斯;
百普赛斯集团ACROBiosystems Group(股票代码:301080)是成立于2010年的跨国生物科技公司,是为全球生物医药、健康产业领域提供关键生物试剂产品及解决方案的行业平台型基石企业。2021年在创业板上市。百普赛斯集团业务遍布全球,横跨亚洲、北美洲、欧洲,在中国、美国、瑞士等12个城市设有办公室、研发中心及生产基地。目前累计服务客户超6000家,与全球Top 20医药企业均建立了长期、稳定的合作伙伴关系。集团旗下拥有品牌ACROBiosystems百普赛斯、bioSeedin柏思荟、Condense Capital垦拓资本和ACRODiagnostics百斯医学等。