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Protéines et Peptides
Numéro de catalogue:
(STMC100-1413)
Fournisseur:
STEMCELL Technologies
Description:
Stimulating T cells with CMV (IE-1) peptide pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. CMV (IE-1) peptide pool is a lyophilised mixture of 120 peptides from the immediate early protein IE1 (IE1) of human cytomegalovirus (CMV; strain AD169), and consists of 15-mer peptides with 11-amino-acid overlaps that cover amino acids 1 to 491 on IE1. CMV IE1 is a transcriptional transactivator and autoregulator (Cherrington and Mocarski). Studies show that IE1 promotes viral transcription by antagonizing histone deacetylation (Nevels <i>et al.</i>) and, along with IE2, may contribute to the survival of CMV-infected cells by blocking tumor necrosis factor alpha (TNF-α)-induced apoptosis (Zhu <i>et al.</i>). Viral peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development.
UOM:
1 * 1 PE
New Product
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Fournisseur:
STEMCELL Technologies
Description:
Myostatin is a member of transforming growth factor beta (TGF-β) superfamily that signals by binding to activin type II receptor, resulting in the recruitment of either ALK3 or ALK4 coreceptor, and activation of SMAD2/3 (Kondás <i>et al.</i>). It is released by myocytes and inhibits muscle growth and ability to regenerate (Lee and Lee). Myostatin appears to affect the lipid catabolic metabolism of adipocytes and inhibits preadipocyte differentiation, as demonstrated in the 3T3-L1 cell line (Li <i>et al.</i>).
Fournisseur:
STEMCELL Technologies
Description:
Tumor necrosis factor-beta (TNF-β), also known as lymphotoxin-alpha, is a member of the TNF family. It is a pro-inflammatory cytokine that activates NF-kB, MAPK, and PI3K/AKT pathways upon binding to TNF receptors 1 and 2. It is produced mainly by T cells, though other cells can express TNF-β at lower levels (Chu). TNF-β is involved in autoimmune disorders, lymph node development, and mediating the inflammatory demyelination process (Seleznik <i>et al.</i>; McCarthy <i>et al.</i>).
Numéro de catalogue:
(STMC100-1414)
Fournisseur:
STEMCELL Technologies
Description:
Stimulating T cells with CMV (HLA Class I Control) Peptide pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. CMV Peptide pool is a lyophilised mixture of 14 peptides from the human cytomegalovirus (CMV) and consists of defined HLA class I-restricted T cell epitopes. Viral peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development. For consistency and reproducibility across your applications, CMV Peptide pools from STEMCELL are formulated as lyophilised trifluoroacetate salts, with a purity ≥95%.
UOM:
1 * 1 PE
New Product
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Numéro de catalogue:
(STMC100-1411)
Fournisseur:
STEMCELL Technologies
Description:
Human (Actin) peptide pool is a lyophilised mixture of 92 peptides from human actin, alpha skeletal muscle, and consists of 15-mer peptides with 11-amino-acid overlaps that cover amino acids 1 to 377 on actin. It is frequently used as a negative control. Actin, alpha skeletal muscle, is part of the highly conserved actin protein family and is the predominant isoform found in adult skeletal muscle (Laing <i>et al.</i>). Peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development.
UOM:
1 * 1 PE
New Product
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Fournisseur:
STEMCELL Technologies
Description:
Interleukin 10 (IL-10) is the founding member of the IL-10 family of class II cytokines. All of the IL-10 cytokine family members have a four-helix bundle consisting of α-helical folds. Upon binding to its receptor, IL-10 activates signaling through JAK1 and STAT3. It is produced by dendritic cells, macrophages, and CD4+ T cells, as well as mast cells, NK cells, neutrophils, and B cells, under specific stimulating conditions (Saraiva and O'Garra). IL-10 can inhibit the expression of pro-inflammatory cytokines and promote healing processes, and is important for the function of regulatory T cells. IL-10 also enhances B cell proliferation, immunoglobulin secretion, and class II MHC expression, while IL-10 produced by macrophages inhibits activation of neighboring macrophages, thus allowing a level of self-regulation (Ouyang <i>et al.</i>).
Numéro de catalogue:
(STMC100-1296)
Fournisseur:
STEMCELL Technologies
Description:
A member of the SIBLING family of glycoproteins (Rangaswami <i>et al.</i>), Osteopontin (OPN) functions as T-helper 1 cytokine, and plays an important role in cell signaling, migration, and activation (Weber <i>et al.</i>, 2002). Osteopontin has been shown to regulate inflammation both in vitro and <i>in vivo</i> (Agnholt <i>et al.</i>; Kiefer <i>et al.</i>), and has been implicated in the pathophysiology of numerous cancers, including prostate (Thalmann <i>et al.</i>), lung (Chambers <i>et al.</i>), ovarian (Kim <i>et al.</i>), and breast etiologies (Weber <i>et al.</i>, 2015). In humans, OPN is initially secreted as a 317 amino acid protein which is subject to tissue-specific post-translational modifications by glycosylation, phosphorylation, and transglutamination (Kazanecki <i>et al.</i>; Sodek <i>et al.</i>). This protein product contains a His-residue tag at the amino end of the polypeptide chain. For consistency and reproducibility across your applications, Osteopontin from STEMCELL comes lyophilised with ≥92% purity, and endotoxin levels are verified to be ≤1,0 EU/μg protein.
UOM:
1 * 1 EA
New Product
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Numéro de catalogue:
(STMC100-1395)
Fournisseur:
STEMCELL Technologies
Description:
Stimulating T cells with HPV16 (E6) Peptide Pool releases downstream cytokines and upregulates activation markers, enabling antigen-specific T cells to be detected or isolated for analysis. HPV16 (E6) Peptide Pool is a lyophilised mixture of 37 peptides from the E6 protein of human papillomavirus type 16 (HPV16). The pool consists of 15-mer peptides with 11-amino-acid overlaps that cover amino acids 1 to 158 on protein E6. E6 binds to the tumor suppressor protein p53 and stimulates its degradation (Scheffner <i>et al.</i>; Werness <i>et al.</i> ), which is thought to cause an increase in spontaneous mutagenesis in host cells (Havre <i>et al.</i>). E6 together with E7 demonstrated the ability to immortalize human keratinocytes in vitro, which likely has significance for HPVs oncogenic potential (Hawley-Nelson <i>et al.</i>). Viral peptide pools are useful for a broad range of applications, including vaccine development, immunological research, and diagnostic assay development.
UOM:
1 * 1 PE
New Product
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Numéro de catalogue:
(STMC100-1299)
Fournisseur:
STEMCELL Technologies
Description:
Use sclerostin to alter bone remodeling homeostasis, where it inhibits bone formation in vivo and in vitro, likely through Wnt/β-catenin signaling cascades (Ellies <i>et al.</i>; Lin <i>et al.</i>). Sclerostin is a member of the cerberus/DAN family of glycoproteins whose members share a C-terminal cysteine-knot-like (CTCK) domain. Highly expressed in bone and cartilage, as well as in kidney, and liver tissues (Weivoda <i>et al.</i>), this osteoclast-derived BMP antagonist binds BMP6 and BMP7 with high affinity, and binds BMP2 and BMP4 with a lower affinity (Kusu <i>et al.</i>). Mutations in the SOST gene have been associated with sclerosteosis (Brunkow <i>et al.</i>), van Buchem disease (Staehling-Hampton <i>et al.</i>), and bone dysplasia disorders, characterized by increased bone density. This protein product contains a His-residue tag at the carboxyl end of the polypeptide chain. For consistency and reproducibility across your applications, sclerostin from STEMCELL comes lyophilised with ≥87% purity, and endotoxin levels are verified to be ≤1.0 EU/μg protein.
UOM:
1 * 1 EA
New Product
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Numéro de catalogue:
(STMC100-1329)
Fournisseur:
STEMCELL Technologies
Description:
Modulate prostaglandin metabolism with 15-hydroxyprostaglandin dehydrogenase (15-PGDH). 15-PGDH catalyses the reversible oxidation of the 15-hydroxyl group in prostaglandins, resulting in inactivated metabolites (Ensor and Tai), it can act on a variety of prostaglandins as substrates in a NAD+ dependent manner (Cho <i>et al.</i>). As prostaglandins can have a range of effects on cellular processes, 15-PGDH is of considerable importance in drug development. In vitro and <i>in vivo</i> studies suggest 15-PGDH has tumor suppressive activity and is downregulated in certain cancers (Na <i>et al.</i>).15-PGDH belongs to the short-chain dehydrogenases/reductases (SDR) family; its primary structure indicates 20% homology with other SDRs, with some conserved amino acid residues (Krook <i>et al.</i>). This protein contains a His-residue tag at the carboxyl end of the polypeptide chain. For consistency and reproducibility across your applications, apo M from STEMCELL comes lyophilised with ≥89% purity.
UOM:
1 * 1 EA
New Product
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Numéro de catalogue:
(STMC100-1333)
Fournisseur:
STEMCELL Technologies
Description:
Fetuin B is thought to have functions in female fertility, metabolism, and liver disease. A protease inhibitor belonging to the fetuin family of proteins, within the cystatin superfamily, fetuin b’s structure includes two cystatin domains (CY1 and CY2) connected by a linker, with a CPDCP-trunk and a C-terminal region (CTR) (Cuppari <i>et al.</i>). This plasma protein originates in the liver (Denecke <i>et al.</i>) and acts to inhibit the activity of ovastacin, a metalloprotease that causes the zona pellucida to harden, leading to female infertility (Karmilin <i>et al.</i>). Fetuin B has also been reported to increase apoptosis, and inhibit migration and invasion of prostate cancer cells, in in vitro and <i>in vivo</i> settings (Zhan <i>et al.</i>). Elevated serum fetuin B has been linked to non-alcoholic fatty liver disease (NAFLD) (Zhu <i>et al.</i>). This protein contains a His-residue tag at the carboxyl end of the polypeptide chain. For consistency and reproducibility across your applications, apolipoprotein H from STEMCELL comes lyophilised with ≥92% purity, and is verified by LAL analysis to ensure endotoxin levels are ≤1,0 EU/μg protein.
UOM:
1 * 1 EA
New Product
Il s'agit d'un élément MarketSource. Des frais supplémentaires peuvent s'appliquer.
Fournisseur:
STEMCELL Technologies
Description:
Interleukin 13 (IL-13) is a type I cytokine, and signals through type I cytokine receptors to activate JAK/STAT and IRS-1/IRS-2 pathways. IL-13 is produced by T cells and innate lymphoid cells (Pulendran and Artis) and it inhibits production of pro-inflammatory cytokines, prostaglandins, and reactive oxygen and nitrogen species by monocytes and macrophages (Hershey). Unlike human B cells, IL-13 has no effect on mouse B cell development and function. IL-13 promotes eosinophil survival, activation, and recruitment, and also activates mast cells (Hershey). IL-13 regulates gastrointestinal parasite expulsion, airway hyperresponsiveness, allergic inflammation, tissue eosinophilia, goblet cell hyperplasia, intracellular parasitism, tissue remodeling, tumor cell growth, and fibrosis. IL-13 induces hypercontractility of smooth muscles by directly acting on the muscle cells as well as the enteric nerves (Wynn).
Fournisseur:
STEMCELL Technologies
Description:
Thrombopoietin (TPO) is a key regulator of megakaryocytopoiesis and thrombopoiesis in vitro and <i>in vivo</i>. TPO stimulates the proliferation and maturation of megakaryocytes and has an important role in regulating the level of circulating platelets <i>in vivo</i>. TPO also promotes the survival, self-renewal, and expansion of hematopoietic stem cells and primitive multilineage progenitor cells. It is commonly used with other cytokines such as stem cell factor (SCF) and Flt3/Flk-2 Ligand to promote expansion of primitive hematopoietic cells in culture (Hitchcock andamp; Kaushansky). The TPO receptor, c-Mpl, is expressed at all stages of megakaryopoiesis, from hematopoietic stem and progenitor cells to mature platelets.
Fournisseur:
STEMCELL Technologies
Description:
Sonic hedgehog (Shh) is a member of the Hedgehog family of secreted signaling proteins that has a prominent role in patterning during early mammalian development (Ho and Scott). It is expressed during early embryogenesis in a variety of tissues (Finco <i>et al.</i>). During patterning of the central nervous system, Shh directly acts on cells to specify neural cell fates, regulates proliferation and survival of oligodendrocytes precursors and neural crest cells and stimulates proliferation, differentiation and axon growth (Ho and Scott; Martí). Shh also regulates T cell differentiation and activation (Crompton <i>et al.</i>). Recombinant human Shh (C24II; rhShh) is a fully biologically active molecule.
Fournisseur:
STEMCELL Technologies
Description:
Interleukin 3 (IL-3) is a species-specific pleiotropic cytokine that promotes the survival and proliferation of pluripotent hematopoietic stem cells and lineage-committed progenitor cells and their differentiation into mature cells of most lineages, including basophils, neutrophils, eosinophils, macrophages, dendritic cells, erythrocytes, and megakaryocytes (Yang <i>et al.</i>; Dorssers <i>et al.</i>; Broughton <i>et al.</i>). IL-3 is produced by activated T cells and has a physiological role in inflammation and allergies by promoting the secretion of inflammatory mediators such as histamine, IL-4, and IL-6 by basophils and eosinophils (Broughton <i>et al.</i>). The IL-3 receptor consists of a unique alpha subunit (CD123) and a beta common subunit (βc or CD131) that is shared with the receptors for IL-5 and GM-CSF, and is the principal signal transduction subunit for these cytokines. IL-3 binding to the heterodimeric receptor activates JAK/STAT, MAPK, and PI3K signaling pathways (Woodcock <i>et al.</i>).
Fournisseur:
STEMCELL Technologies
Description:
Granulocyte colony-stimulating factor (G-CSF) is a member of the CSF family of glycoproteins that regulate hematopoietic cell proliferation, differentiation, and function. It is a key cytokine involved in the production of neutrophils and the stimulation of granulocyte colony formation from hematopoietic progenitor cells (Metcalf and Nicola). G-CSF causes a range of effects including a transient reduction of SDF-1 expression (Petit <i>et al.</i>), the activation of metalloproteases that cleave VCAM-1 (Levesque <i>et al.</i>), and the release of norepinephrine from the sympathetic nervous system (Katayama <i>et al.</i>), leading to the release or mobilization of hematopoietic stem cells from the bone marrow into the periphery. The G-CSF receptor is expressed on a variety of hematopoietic cells, including myeloid-committed progenitor cells, neutrophils, granulocytes, and monocytes. In addition to hematopoietic cells, G-CSF is also expressed in cardiomyocytes, neuronal cells, mesothelial cells, and endothelial cells. Mouse G-CSF was first purified from cultures of the WEHI-3B myelomonocytic leukemia cell line as the inducer of the terminal differentiation of WEHI-3B and other myeloid leukemia cell lines (Nicola <i>et al.</i>). It was later cloned in monkey COS cells from a cDNA library prepared with mRNA derived from mouse fibrosarcoma NFSA cells that produce G-CSF constitutively (Tsuchiya <i>et al.</i>). Binding of G-CSF to its receptor leads to activation of the JAK/STAT, MAPK, PI3K, and AKT signal transduction pathways.
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