Recombinant Human LIF Protein

Images

 
SDS-Page: Recombinant Human LIF Protein [NBP2-76314] - 1 ug in each lane (-) non-reducing conditions and (+) reducing conditions in a 4-20% Tris-Glycine gel.
Bioactivity: Recombinant Human LIF Protein [NBP2-76314] - LIF induced proliferation of TF-1 cells.

Product Details

Summary
Reactivity HuSpecies Glossary
Applications PAGE, Bioactivity
Concentration
LYOPH

Order Details

Recombinant Human LIF Protein Summary

Description
An un-tagged bioactive recombinant protein corresponding to Human LIF

Source: E. coli

Amino Acid Sequence: MSPLPITPVNA TCAIRHPCHN NLMNQIRSQL AQLNGSANAL FILYYTAQGE PFPNNLDKLC GPNVTDFPPF HANGTEKAKL VELYRIVVYL GTSLGNITRD QKILNPSALS LHSKLNATAD ILRGLLSNVL CRLCSKYHVG HVDVTYGPDT SGKDVFQKKK LGCQLLGKYK QIIAVLAQAF

Specificity
LIF is a monomer, 19.8 kDa (181 aa)
Preparation
Method
Protein is derived from genetically modified E. coli.
Details of Functionality
TF-1 cell proliferation, >5 x 10^6 units/mg (ED50 acceptance criteria are <200 pg/mL).
Source
E. coli
Protein/Peptide Type
Recombinant Protein
Gene
LIF
Purity
>95%, by SDS-PAGE
Endotoxin Note
Acceptance criteria for endotoxin levels are <1 EUs/ug protein (determined by Kinetic LAL Method).

Applications/Dilutions

Dilutions
  • Bioactivity
  • SDS-Page
Theoretical MW
19.8 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Packaging, Storage & Formulations

Storage
Store at -20 to -70C as supplied. After reconstitution, store at 2 to 8C for 1 month and at -20 to -70C for long term storage. Avoid repeated freeze-thaw cycles.
Buffer
Lyophilized from a sterile (0.2 micron) filtered aqueous solution containing 0.1% Trifluoroacetic Acid (TFA)
Preservative
No Preservative
Concentration
LYOPH
Purity
>95%, by SDS-PAGE
Reconstitution Instructions
Sterile 10 mM acetic acid at 0.1 mg/mL

Notes

Lot Specific Information:
Given endotoxin and ED50 values are acceptance criteria standards. For lot specific values, please contact technical support.

Detailed Reconstitution:
Centrifuge vial before opening. Suspend the product by gently pipetting the recommended solution down the sides of the vial. DO NOT VORTEX. Allow several minutes for complete reconstitution. For prolonged storage, dilute to working aliquots in a 0.1% BSA solution, store at -80C and avoid repeat freeze thaws.

Expiration Date:
12 months from date of receipt when stored at -20C to-80C as supplied. 1 month when stored at 4C after reconstituting as directed. 3 months when stored at -20C to -80C after reconstituting as directed.

Alternate Names for Recombinant Human LIF Protein

  • CDF
  • D Factor
  • DIA
  • differentiation inhibitory activity
  • differentiation stimulating factor
  • Differentiation-stimulating factor
  • Emfilermin
  • HILDA
  • HILDAcholinergic differentiation factor
  • leukemia inhibitory factor (cholinergic differentiation factor)
  • leukemia inhibitory factor
  • LIF
  • Melanoma-derived LPL inhibitor
  • MLPLI

Background

LIF (leukemia inhibitory factor, myeloid leukemia inhibitory factor) a pleiotropic lymphoid factor was initially described as a factor that inhibits the proliferation of myeloid leukemia cells and induces their differentiation into macrophages. Other activities of LIF include inhibition of adipogenesis, cholinergic neuron differentiation and bone metabolism. Human and mouse LIF share 78% homology and activities of LIF are not species-specific. Human LIF is active on mouse cells, but murine LIF is not active on human cells. Benefits of NovActive® Proteins
Fully Active
-Fully folded naturally by eukaryotic source
-Comparable for eukaryotic glycosylation
BioRisk Free
-animal-free
-serum-free
-endotoxin-free
-infection reagent-free
-low in proteolyic activity
-low in pyrogenic and pro-inflammatory activity
Just reconstitute and add to your cell culture.
Have FDA G.R.A.S. (generally recognized as safe) approval.
Advantages of barley endosperm Folding -Proficient protein machinery, with eukaryotic folding, allows for native formation of the protein and long term protection and storage. Environment -A biochemically inert environment, void of endotoxins, low protease activity and secondary metabolite content, and a simple protein profile, aid in downstream processing in barley. FDA G.R.A.S status -Barley is recognized by the FDA as having G.R.A.S (generally recognized as safe) status.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. This product is guaranteed for 1 year from date of receipt.

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Bioinformatics

Gene Symbol LIF