Reactivity | HuSpecies Glossary |
Applications | WB, ELISA(Det) |
Clonality | Polyclonal |
Host | Goat |
Conjugate | Biotin |
Concentration | LYOPH |
Immunogen | S. frugiperda insect ovarian cell line Sf 21-derived recombinant human Thrombopoietin (R&D Systems, Catalog # 288-TP) Ser22-Gly353 Accession # P40225 |
Specificity | Detects human Thrombopoietin in ELISAs and Western blots. In sandwich immunoassays, less than 0.2% cross-reactivity with recombinant mouse Thrombopoietin, recombinant human (rh) Erythropoietin, and rhThrombopoietin R is observed. |
Source | N/A |
Isotype | IgG |
Clonality | Polyclonal |
Host | Goat |
Gene | THPO |
Purity Statement | Antigen Affinity-purified |
Innovator's Reward | Test in a species/application not listed above to receive a full credit towards a future purchase. |
Dilutions |
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Application Notes | ELISA Capture: Human Thrombopoietin/Tpo Antibody (Catalog # MAB288) ELISA Detection: Human Thrombopoietin/Tpo Biotinylated Antibody (Catalog # BAF288) Standard: Recombinant Human Thrombopoietin/Tpo (Catalog # 288-TPN) |
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Readout System | ||
Publications |
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Storage | Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
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Buffer | Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein. |
Preservative | No Preservative |
Concentration | LYOPH |
Reconstitution Instructions | Reconstitute at 0.2 mg/mL in sterile PBS. |
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). Full length Tpo and shorter forms circulate in the plasma (4, 5). 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 (15, 16).
Secondary Antibodies |
Isotype Controls |
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