Biotinylated Human Siglec-2 / CD22 Protein, Fc Tag, premium grade, ultra sensitivity (primary amine labeling)
分子别名(Synonym)
CD22,SIGLEC2,BL-CAM,SIGLEC-2,Siglec2,SIGLEC2FLJ22814
表达区间及表达系统(Source)
Biotinylated Human Siglec-2 Protein, Fc Tag, premium grade, primary amine labeling (CD2-H5254) is expressed from human 293 cells (HEK293). It contains AA Asp 20 - Arg 687 (Accession # P20273-1).
Predicted N-terminus: Asp 20
该产品是在我们严格的质量控制体系下生产的,该体系包含一套全面的测试,包括无菌和内毒素测试。在早期临床前阶段,产品性能经过仔细验证和测试,以确保其与细胞培养用途或任何其他应用的兼容性。当准备过渡到后期临床阶段时,我们还提供定制的GMP蛋白质服务,以满足您的需求。我们将与您合作,根据您的要求定制和开发GMP级产品,该产品也符合细胞疗法细胞制造中使用的原材料和辅助材料的要求。
蛋白结构(Molecular Characterization)

This protein carries a human IgG1 Fc tag at the C-terminus.
The protein has a calculated MW of 101.6 kDa. The protein migrates as 139 kDa±5 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
标记(Labeling)
The primary amines in the side chains of lysine residues and the N-terminus of the protein are conjugated with biotins using standard chemical labeling method. A standard biotin reagent (13.5 angstroms) is used in this product.
蛋白标记度(Protein Ratio)
Passed as determined by the HABA assay / binding ELISA.
内毒素(Endotoxin)
Less than 0.1 EU per μg by the LAL 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)
>90% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.
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 24 months in lyophilized state;
-70°C for 3 months under sterile conditions after reconstitution.

背景(Background)
B细胞受体CD22也被称为唾液酸结合Ig样凝集素2(Siglec-2)、B淋巴细胞粘附分子(BL-CAM)、T细胞表面抗原Leu-14,属于免疫球蛋白超家族和Siglec(唾液酸结合Ig-like凝集素)家族。CD22介导B细胞与B细胞的相互作用,并可能参与B细胞在淋巴组织中的定位。Siglec-2/CD22结合唾液酸化糖蛋白,其中之一是CD45。Siglec2/CD22通过与Src家族酪氨酸激酶的相互作用在正向调节中发挥作用,也可能通过其SH2结构域招募细胞质磷酸酶来充当抑制性受体,SH2结构区通过信号分子的去磷酸化阻断信号转导。
关键字: Siglec-2;Siglec-2蛋白;Siglec-2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。