名称:重组小鼠M-CSF
Synonyms:CSF-1, MGI-IM
Accession:Q3U4F9
Unigene:Mm.795.
Source:Escherichia coli.
Molecular Weight:Approximately 52.0 kDa, a disulfide-linked homodimer consisting of two 230 amino acid polypeptide chains.
Quantity:2µg/10µg/1000µg
AA Sequence:KEVSEHCSHM IGNGHLKVLQ QLIDSQMETS CQIAFEFVDQ EQLDDPVCYL KKAFFLVQDI IDETMRFKDN TPNANATERL QELSNNLNSC FTKDYEEQNK ACVRTFHETP LQLLEKIKNF FNETKNLLEK DWNIFTKNCN NSFAKCSSRD VVTKPDCNCL YPKATPSSDP ASASPHQPPA PSMAPLAGLA WDDSQRTEGS SLLPSELPLR IEDPGSAKQR PPRSTCQTLE
Purity:> 95 % by SDS-PAGE and HPLC analyses.
Biological Activity:Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using murine M-NFS-60 cells is less than 2 ng/ml, corresponding to a specific activity of > 5.0 × 105 IU/mg.
Physical Appearance:Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation:Lyophilized from a 0.2 μm filtered solution in 20 mM Tris, 500 mM NaCl, pH 7.4.
Endotoxin:Less than 1 EU/μg of rMuM-CSF as determined by LAL method.
Reconstitution:We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.
Stability & Storage:Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
- 12 months from date of receipt, -20 to -70 °C as supplied.
- 1 month, 2 to 8 °C under sterile conditions after reconstitution.
- 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Reference:1. Cosman D, Wignall J, Anderson D, et al. 1988. Behring Inst Mitt: 15-26.
2. Metcalf D, Willson T, Rossner M, et al. 1994. Growth Factors, 11: 145-52.
3. Hidaka T, Fujimura M, Nakashima A, et al. 2002. Jpn J Cancer Res, 93: 426-35.
4. Kubota Y, Takubo K, Shimizu T, et al. 2009. J Exp Med, 206: 1089-102.
Background:Macrophage Colony Stimulating Factor (M-CSF), also named CSF-1, is a hematopoietic growth factor that is involved in the proliferation, differentiation, and survival of monocytes, macrophages, and bone marrow progenitor cells. It is produced by osteoblasts (as a result of endocrine stimulation by parathyroid hormone) exerts paracrine effects on osteoclasts and can interact with CSF1R. M-CSF is a four α-helical bundle cytokine and its active form is found extracellularly as a disulfide-linked homodimer. Four transcript variants encoding three different isoforms have been reported for M-CSF gene. Although forms may vary, all of them contain the N-terminal 150 a.a. portion that is necessary and sufficient for interaction with the receptor. The first 229 a.a. of mature mouse M-CSF shares 87 %, 83 %, 82 % and 81 % sequence identity with corresponding regions of rat, dog, cow and human M-CSF, respectively. Human M-CSF is active in the mouse, but mouse M-CSF is reported to be species-specific.