重組鼠白血病抑制因子蛋白

Synonyms	Differentiation-stimulating Factor, D factor, Melanoma-derived LPL Inhibitor , MLPLI
Species	Murine
Accession	P09056
GeneID	16878
Source	Escherichia coli.
Molecular Weight	重組鼠白血病抑制因子蛋白Approximately 19.9 kDa, a single non-glycosylated polypeptide chain containing 180 amino acids.
Quantity	5μg/25μg/1000μg
AA Sequence	SPLPITPVNA TCAIRHPCHG NLMNQIKNQL AQLNGSANAL FISYYTAQGE PFPNNVEKLC APNMTDFPSF HGNGTEKTKL VELYRMVAYL SASLTNITRD QKVLNPTAVS LQVKLNATID VMRGLLSNVL CRLCNKYRVG HVDVPPVPDH SDKEAFQRKK LGCQLLGTYK QVISVVVQAF
Purity	> 98 % by SDS-PAGE and HPLC analyses.
Biological Activity	重組鼠白血病抑制因子蛋白Fully biologically active when compared to standard. The specific activity is determined by inducing differentiation of murine M1 myeloid leukemic cells. The minimum detectable concentration of rMuLIF in this assay is 0.01 ng/ml. The specific activity of > 1.0 × 108 IU/mg, where 50 units is defined as the amount of rMuLIF required to induce differentiation in 50 % of the M1 colonies in 1 ml agar cultures.
Physical Appearance	Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation	Lyophilized from a 0.2 μm filtered concentrated solution in 20 mM PB, pH 7.4, with 0.02 % TWEEN 20.
Endotoxin	Less than 1 EU/μg of rMuLIF as determined by LAL method.
Reconstitution	重組鼠白血病抑制因子蛋白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.
Storage	This lyophilized preparation is stable at 2-8 °C, but should be kept at -20 °C for long term storage, preferably desiccated. Upon reconstitution, the preparation is stable for up to one week at 2-8 °C. For maximal stability, apportion the reconstituted preparation into working aliquots and store at -20 °C to -70 °C. Avoid repeated freeze/thaw cycles.
重組鼠白血病抑制因子蛋白
SDS-PAGE
Reference	1. Eswari S, Sai Kumar G, Sharma GT. 2012. Zygote: 1-11. 2. Mathieu ME, Saucourt C, Mournetas V, et al. 2012. Stem Cell Rev, 8: 1-15. 3. Thomson AJ, Pierart H, Meek S, et al. 2012. Cell Reprogram, 14: 112-22. 4. Li HandGrumet M. 2007. Glia, 55: 24-35.
Background	Leukemia inhibitory factor (LIF) is a member of Interleukin 6 family. This protein is mainly expressed in the trophectoderm of the developing embryo, with its receptor LIFR expressed throughout the inner cell mass. LIF has the capacity to induce terminal differentiation in leukemic cells. Its activities include the induction of hematopoietic differentiation in normal and myeloid leukemia cells, the induction of neuronal cell differentiation, and the stimulation of acute-phase protein synthesis in hepatocytes. LIF is used in mouse embryonic stem cell culture, because that removal of LIF pushes stem cells toward differentiation, but they retain their proliferative potential or pluripotency. It is also used in phase II clinical trial, which can assist embryo implantation in women who have failed to become pregnant despite assisted reproductive technologies (ART). Mature mouse LIF shares 78 % a.a. sequence identity with Human LIF.