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Mouse GM-CSF, amino acids Ala18-Lys141 (Accession # NM_009969) was expressed in E. coli.
Molecular Mass:
The 125 amino acid N-terminal methionylated recombinant protein has a predicted molecular mass of 14.2 kDa. The DTT-reduced protein migrates at approximately 13 kDa and the non-reduced protein migrates at approximately 11kDa by SDS-PAGE.
Purity:
Purity is >98%, as determined by Coomassie stained SDS-PAGE.
Formulation:
0.22 µm filtered protein solution is in 10mM NaH2PO4, 150mM NaCl, pH 7.2.
Endotoxin Level:
Endotoxin level is <0.1 EU/µg (<0.01ng/µg) protein as determined by the LAL method.
Preparation:
10-100µg sizes are bottled at 200µg/ml. 500µg and larger sizes are bottled at the concentration indicated on the vial.
Storage & Handling:
Unopened vial can be stored at 4°C for three months, at -20°C for six months, or at -70°C for one year. For maximum results, quick spin vial prior to opening. Stock solutions should be prepared at no less than 10µg/mL in buffer containing carrier protein such as 1% BSA or HSA or 10% FBS. For long term storage, aliquot into polypropylene vials and store in a manual defrost freezer. Avoid repeated freeze/thaw cycles.
Activity:
The ED50 is <0.05 ng/ml, corresponding to a specific activity >2x107 units/mg.
FDC-P1 cell proliferation induced by mouse GM-CSF.
Description:
GM-CSF is a hematopoietic factor that is produced by T cells, macrophages, fibroblasts and endothelial cells. This multifunctional cytokine stimulates progenitor cells of neutrophils, eosinophils and macrophages. GM-CSF is also a differentiation and activating factor for granulocytic and monocytic cells.
Growth/development granulocyte/macrophage progenitors; differentiates myeloblasts/monoblasts; synergizes with Epo proliferation of erythroid/megakaryocytic progenitors
Antigen References:
1. Fitzgerald K, et al. Eds. 2001. The Cytokine FactsBook. Academic Press San Diego. 2. Demetri G, et al. 1991. Blood 78:2791. 3. Fan D, et al. 1991. In vivo 5:571. 4. Negrin R, et al. 1992. Adv. Pharmacol. 23:263.
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