Biotinylated Human Siglec-2 / CD22 Protein, His,Avitag™, premium grade
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, His,Avitag, premium grade (SI2-H82E3) is expressed from human 293 cells (HEK293). It contains AA Asp 20 - Arg 687 (Accession # P20273-1).
Predicted N-terminus: Asp 20
该产品在我们严苛的质量控制体系下生产,涵盖包括无菌检测和内毒素检测在内的全套测试。产品性能经过严谨验证与测试,确保其适用于细胞培养或临床前阶段的其他应用。
蛋白结构(Molecular Characterization)

This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™).
The protein has a calculated MW of 78.7 kDa. The protein migrates as 108 kDa±3 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
标记(Labeling)
Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.
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 / rFC method.
宿主蛋白残留(Host Cell Protein)
<0.5 ng/µg of protein tested by ELISA.
无菌(Sterility)
Negative
支原体(Mycoplasma)
Negative
纯度(Purity)
>95% 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.

背景介绍
B细胞受体CD22,亦称为唾液酸结合免疫球蛋白样凝集素2(Siglec-2)、B淋巴细胞黏附分子(BL-CAM)、T细胞表面抗原Leu-14,属于免疫球蛋白超家族及SIGLEC(唾液酸结合免疫球蛋白样凝集素)家族。CD22介导B细胞间的相互作用,并可能参与B细胞在淋巴组织中的定位。Siglec-2/CD22可结合唾液酸化糖蛋白,其中一种配体为CD45。该蛋白通过与Src家族酪氨酸激酶相互作用发挥正向调控功能;同时也可作为抑制性受体,通过其SH2结构域招募胞内磷酸酶,使信号分子去磷酸化,从而阻断信号传导。
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。