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Your Position: Home > Protein > Thrombopoietin > THN-H5216

Human Thrombopoietin / TPO Protein, premium grade

GMP version GMP-THNH25 is now available for seamless transition.

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  • Synonym
    THPO,MGC163194,MGDF,MKCSF,ML,MPLLG,TPO,THCYT1
  • 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
    It is produced under our rigorous quality control system that incorporates a comprehensive set of tests including sterility and endotoxin tests. Product performance is carefully validated and tested for compatibility for cell culture use or any other applications in the early preclinical stage.
    GMP-THNH25 is the GMP version of this THN-H5216. These two proteins display indistinguishable performance profiles, thereby ensuring a seamless transition for end users from early preclinical stag to later clinical phases.
  • Molecular Characterization
    Thrombopoietin Structure

    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.

  • Endotoxin
    Less than 0.01 EU per μg by the LAL method / rFC method.
  • Host Cell Protein
    <0.5 ng/µg of protein tested by ELISA.
  • Host Cell DNA
    <0.02 ng/μg of protein tested by qPCR.
  • Sterility
    Negative
  • Mycoplasma
    Negative
  • Purity

    >95% as determined by SDS-PAGE.

  • 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.

  • 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.

  • 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:

    1. -20°C to -70°C for 24 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
SDS-PAGE
Thrombopoietin SDS-PAGE

Human Thrombopoietin Protein, premium grade on SDS-PAGE under reducing (R) and non-reducing (NR) conditions. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95% (With Star Ribbon Pre-stained Protein Marker).

Bioactivity-CELL BASE
 Thrombopoietin CELL

Human Thrombopoietin Protein, premium grade (Cat. No. THN-H5216) stimulates proliferation of Mo7e cells. The specific activity of Human Thrombopoietin Protein, premium grade is > 1.00ⅹ10^7 IU/mg, which is calibrated against human TPO Standard (NIBSC code: 03/124) (QC tested).

Bioactivity-SPR
 Thrombopoietin SPR

Human Thrombopoietin R, His Tag (Cat. No. THR-H52H7) captured on CM5 chip via anti-His antibody can bind Human Thrombopoietin Protein, premium grade (Cat. No. THN-H5216) with an affinity constant of 2.96 nM as determined in a SPR assay (Biacore 8K) (Routinely tested).

Bioactivity-Stability
 Thrombopoietin STABILITY

The Cell based assay shows batch-to-batch consistency between Acro's GMP and PG Thrombopoietin.

  • 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).
  • Clinical and Translational Updates

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