PE-Labeled Human CD19 (20-291) Protein, His Tag (Site-specific conjugation)
分子别名(Synonym)
CD19,B4,CVID3,MGC12802
表达区间及表达系统(Source)
PE-Labeled Human CD19 (20-291), His Tag (CD9-HP2H3) is produced via site-specific conjugation of PE to Human CD19 (20-291), His Tag under optimal conditions with a proprietary technology. Human CD19 (20-291), His Tag is expressed from human 293 cells (HEK293). It contains AA Pro 20 - Lys 291 (Accession # P15391-1).
Predicted N-terminus: Pro 20
蛋白结构(Molecular Characterization)

This protein carries a polyhistidine tag at the C-terminus.
The protein has a calculated MW of 33.7 kDa.
偶联(Conjugate)
PE
Excitation Wavelength: 488 nm / 561 nm
Emission Wavelength: 575 nm
应用说明(Application)
Evaluation of anti-CD19 CAR expression by flow cytometry. Please note that this product is NOT compatible to streptavidin detection system.
制剂(Formulation)
Lyophilized from 0.22 μm filtered solution in PBS, 0.5% BSA, 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 protect from light and 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
B淋巴细胞抗原CD19(亦称分化簇19),是一种包含两个免疫球蛋白样C2型结构域的单次跨膜I型蛋白。该蛋白表达于滤泡树突细胞及B细胞表面,其表达贯穿B细胞发育全程——从最早期的B系祖细胞直至原始B细胞阶段,但在成熟分化为浆细胞时消失。CD19主要作为B细胞共受体,与CD21及CD81协同发挥作用。当B细胞激活时,CD19胞内段发生磷酸化,进而招募Src家族激酶并结合PI-3激酶。
在B淋巴细胞表面,若干分子共同构成抗原受体复合物,其中(近乎)B细胞特异性的CD19磷酸化糖蛋白是核心组分,其余成员包括CD21与CD81。这些与表面免疫球蛋白(sIg)关联的分子协同介导信号转导。活体B细胞实验中,模拟外源抗原的抗免疫球蛋白抗体会引发CD19与sIg结合并随之内化,但反向过程尚未证实,表明该受体复合物的形成具有抗原诱导特性(化学研究已确证此分子互作)。
CD19基因突变可导致以抗体产生缺陷为特征的严重免疫缺陷综合征。目前已证实CD19可与下列分子相互作用:CD81、CD82、补体受体2及VAV2蛋白。
关键字: CD19;CD19蛋白;CD19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。