Human Thrombopoietin / TPO Protein, premium grade
分子别名（Synonym）
THPO,MGC163194,MGDF,MKCSF,ML,MPLLG,TPO,THCYT1
表达区间及表达系统（Source）
Human Thrombopoietin Protein, premium grade (THN-H5216) is expressed from human 293 cells (HEK293). It contains AA Ser 22 - Gly 353 (Accession # P40225-1).
Predicted N-terminus: Ser 22
它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。
GMP-THNH25是THN-H5216的GMP版本。这两种蛋白质显示出无法区分的性能特征，从而确保最终用户从早期临床前阶段无缝过渡到后期临床阶段。
蛋白结构（Molecular Characterization）
This protein carries no "tag".
The protein has a calculated MW of 35.5 kDa. The protein migrates as 75 kDa±5 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.
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.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in 20 mM NaAc-HAc, pH5.0 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）
Thrombopoietin (Tpo), is a key regulator of megakaryocytopoiesis and thrombopoiesis. It is principally produced in the liver and is bound and internalized by the receptor Tpo R/c-mpl. Defects in the Tpo-Tpo R signaling pathway are associated with a variety of platelet disorders (1-3). The 353 amino acid (aa) human Tpo precursor is cleaved to yield the 332 aa mature protein. Mature human Tpo shares approximately 70% aa sequence homology with mouse and rat Tpo. It is an 80 85 kDa protein that consists of an N terminal domain with homology to Erythropoietin (Epo) and a C terminal domain that contains multiple N linked and O-linked glycosylation sites (4, 5). Tissue specific alternate splicing of human Tpo generates multiple isoforms with internal deletions, insertions, and/or C terminal substitutions (6). Tpo promotes the differentiation, proliferation, and maturation of MK and their progenitors (4, 5, 7). Several other cytokines can promote these functions as well but only in cooperation with Tpo (8, 9). Notably, IL-3 independently induces MK development, although its effects are restricted to early in the MK lineage (8, 9). Tpo additionally promotes platelet production, aggregation, ECM adhesion, and activation (10-13). It is cleaved by platelet-derived thrombin following Arg191 within the C terminal domain and subsequently at other sites upon extended digestion (14). Both full length Tpo and shorter forms circulate in the plasma, with the shorter, N terminal EPO-like domain forms showing significantly increased specific activity (4, 5, 15). The C terminal domain is not required for binding to Tpo R or inducing MK growth and differentiation (5). Aside from its hematopoietic effects, Tpo is expressed in the brain where it promotes the apoptosis of hypoxia-sensitized neurons and inhibits neuronal differentiation by blocking NGF induced signaling (16, 17).
关键字： Thrombopoietin;Thrombopoietin蛋白;TPO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。