Biotinylated Human Siglec-2 / CD22 Protein, Fc Tag, premium grade, ultra sensitivity (primary amine labeling)
分子別名(Synonym)
CD22,SIGLEC2,BL-CAM,SIGLEC-2,Siglec2,SIGLEC2FLJ22814
表達區(qū)間及表達系統(tǒng)(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
該產(chǎn)品是在我們嚴格的質(zhì)量控制體系下生產(chǎn)的,該體系包含一套全面的測試,包括無菌和內(nèi)毒素測試。在早期臨床前階段,產(chǎn)品性能經(jīng)過仔細驗證和測試,以確保其與細胞培養(yǎng)用途或任何其他應(yīng)用的兼容性。當準備過渡到后期臨床階段時,我們還提供定制的GMP蛋白質(zhì)服務(wù),以滿足您的需求。我們將與您合作,根據(jù)您的要求定制和開發(fā)GMP級產(chǎn)品,該產(chǎn)品也符合細胞療法細胞制造中使用的原材料和輔助材料的要求。
蛋白結(jié)構(gòu)(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.
標記(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.
蛋白標記度(Protein Ratio)
Passed as determined by the HABA assay / binding ELISA.
內(nèi)毒素(Endotoxin)
Less than 0.1 EU per μg by the LAL method.
宿主蛋白殘留(Host Cell Protein)
<0.5 ng/μg of protein tested by ELISA.
宿主核酸殘留(Host Cell DNA)
<0.02 ng/μg of protein tested by qPCR.
無菌(Sterility)
Negative
支原體(Mycoplasma)
Negative.
純度(Purity)
>90% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.
制劑(Formulation)
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
Contact us for customized product form or formulation.
重構(gòu)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.
存儲(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細胞受體CD22也被稱為唾液酸結(jié)合Ig樣凝集素2(Siglec-2)、B淋巴細胞粘附分子(BL-CAM)、T細胞表面抗原Leu-14,屬于免疫球蛋白超家族和Siglec(唾液酸結(jié)合Ig-like凝集素)家族。CD22介導B細胞與B細胞的相互作用,并可能參與B細胞在淋巴組織中的定位。Siglec-2/CD22結(jié)合唾液酸化糖蛋白,其中之一是CD45。Siglec2/CD22通過與Src家族酪氨酸激酶的相互作用在正向調(diào)節(jié)中發(fā)揮作用,也可能通過其SH2結(jié)構(gòu)域招募細胞質(zhì)磷酸酶來充當抑制性受體,SH2結(jié)構(gòu)區(qū)通過信號分子的去磷酸化阻斷信號轉(zhuǎn)導。
關(guān)鍵字: Siglec-2;Siglec-2蛋白;Siglec-2重組蛋白;ACRO;百普賽斯;
百普賽斯集團ACROBiosystems Group(股票代碼:301080)是成立于2010年的跨國生物科技公司,是為全球生物醫(yī)藥、健康產(chǎn)業(yè)領(lǐng)域提供關(guān)鍵生物試劑產(chǎn)品及解決方案的行業(yè)平臺型基石企業(yè)。2021年在創(chuàng)業(yè)板上市。百普賽斯集團業(yè)務(wù)遍布全球,橫跨亞洲、北美洲、歐洲,在中國、美國、瑞士等12個城市設(shè)有辦公室、研發(fā)中心及生產(chǎn)基地。目前累計服務(wù)客戶超6000家,與全球Top 20醫(yī)藥企業(yè)均建立了長期、穩(wěn)定的合作伙伴關(guān)系。集團旗下?lián)碛衅放艫CROBiosystems百普賽斯、bioSeedin柏思薈、Condense Capital墾拓資本和ACRODiagnostics百斯醫(yī)學等。