LIF Protein

Catalog No. ABIN1097081

Recombinant LIF protein expressed in Escherichia coli (E. coli).

Quick Overview for LIF Protein (ABIN1097081)

Target: LIF (Leukemia Inhibitory Factor (LIF))

Protein Type: Recombinant

Biological Activity: Active

Origin: Human

Source: Escherichia coli (E. coli)

Application: Functional Studies (Func)

Purity: > 95 % as determined by reducing SDS-PAGE.

Product Details

Purpose: Recombinant Human Leukemia Inhibitory Factor/LIF

Sequence: MSPLPITPVN ATCAIRHPCH NNLMNQIRSQ LAQLNGSANA LFILYYTAQG EPFPNNLDKL CGPNVTDFPP FHANGTEKAK LVELYRIVVY LGTSLGNITR DQKILNPSAL SLHSKLNATA DILRGLLSNV LCRLCSKYHV GHVDVTYGPD TSGKDVFQKK KLGCQLLGKY KQIIAVLAQA F

Characteristics: Recombinant Human LIF, Leukemia Inhibitory Factor produced in E. coli is a single non-glycosylated polypeptide chain containing 180 amino acids with a molecular mass of 19.7 kDa.

Sterility: 0.2 μm filtered

Endotoxin Level: Less than 0.1 ng/μg (1 IEU/μg) as determined by LAL test

Application Details

Comment:

Biological activity: ED50 is less than 0.01 ng/ml as determined by the M1 cell differentiation assay.Specific Activity of 1.0 x 108 IU/mg.

Restrictions: For Research Use only

Handling

Format: Lyophilized

Reconstitution: It is not recommended to reconstitute to a concentration less than 100 μg/mL.
Dissolve the lyophilized protein in ddH2O.
Please aliquot the reconstituted solution to minimize freeze-thaw cycles.

Buffer: Lyophilized from a 0.2 μm filtered solution of 20 mM PB, 150 mM NaCl, 0.02 % Tween 20, pH 7.4.

Handling Advice: Always centrifuge tubes before opening. Do not mix by vortex or pipetting.

Storage: 4 °C/-20 °C/-80 °C

Storage Comment: Lyophilized protein should be stored at < -20°C, though stable at room temperature for 3 weeks.
Reconstituted protein solution can be stored at 4-7°C for 2-7 days.
Aliquots of reconstituted samples are stable at < -20°C for 3 months.

Expiry Date: 3 months

Target Details

Target: LIF (Leukemia Inhibitory Factor (LIF))

Alternative Name: leukemia-inhibitory-factor

Background: Leukemia Inhibitory Factor (LIF) is a lymphoid factor that promotes long-term maintenance of embryonic stem cells by suppressing spontaneous differentiation. LIF has a number of other activities including cholinergic neuron differentiation, control of stem cell pluripotency, bone and fat metabolism, mitogenesis of certain factor dependent cell lines and promotion of megakaryocyte production in vivo. Human and murine mature LIF exhibit a 78% sequence identity at the amino acid level. Human LIF is equally active on human and mouse cells. Murine LIF is approximately 1000 fold less active on human cells than human LIF.
Alternative Names: Recombinant Human LIF, Leukemia Inhibitory Factor, LIF, Differentiation-Stimulating Factor, D Factor, Melanoma-Derived LPL Inhibitor, MLPLI, Emfilermin, LIF, HILDA

Molecular Weight: 19.7 kDa

UniProt: P15018

Pathways: JAK-STAT Signaling, Positive Regulation of Peptide Hormone Secretion, Negative Regulation of Hormone Secretion, Stem Cell Maintenance, Growth Factor Binding