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Recombinant Biotinylated Human Mesothelin / MSLN (296-580), ultra sensitivity (primary amine labeling), His-Tag, 200µg  

Recombinant Biotinylated Human Mesothelin / MSLN (296-580), ultra sensitivity (primary amine labeling), His-Tag, 200µg

Recombinant Biotinylated Human Mesothelin / MSLN (296-580) Protein, expressed from human HEK293 cells, ultra sensitivity (primary amine labeling), His-Tag

Synonym
recombinant, human, biotinylated, protein, MSLN,Mesothelin,MPF

More details

MSN-H8223-200

Availability: within 7 days

1 250,00 €

Background
Mesothelin (MSLN) is also known as CAK1 antigen, Pre-pro-megakaryocyte-potentiating factor, which belongs to the mesothelin family. Mesothelin / MSLN can be proteolytically cleaved into the following two chains by a furin-like convertase: Megakaryocyte-potentiating factor (MPF) and the cleaved form of mesothelin. Both MPF and the cleaved form of mesothelin are N-glycosylated. Mesothelin / MSLN can interacts with MUC16. The membrane-anchored forms of MSLN may play a role in cellular adhesion. MPF potentiates megakaryocyte colony formation in vitro.

Source
Recombinant Biotinylated Human Mesothelin (296-580), His Tag, primary amine labeling (MSN-H8223) is expressed from human HEK293 cells. It contains AA Glu 296 - Gly 580 (Accession # AAH09272). It is the biotinylated form of Human Mesothelin (296-580), His Tag (MSN-H5223).

Predicted N-terminus: Glu 296

Molecular Characterization
This protein carries a polyhistidine tag at the C-terminus. The protein has a calculated MW of 33.0 kDa. The protein migrates as 38-50 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

Biotinylation
The primary amines in the side chains of lysine residues and the N-terminus of the protein are conjugated with biotins using standard chemical labeling method. A standard biotin reagent (13.5 angstroms) is used in this product.

Biotin:Protein Ratio
The biotin to protein ratio is 1.5-3.5 as determined by the HABA assay.

Endotoxin
Less than 1.0 EU per μg by the LAL method.

Purity
>95% as determined by SDS-PAGE.

Formulation
Lyophilized from 0.22µm filtered solution in PBS (pH 7.4) with Trehalose as protectant.
Coformulationntact us for customized product form or.

Reconstitution
Reconstitute at 100 μg/mL in sterile deionized water. For best performance, we strongly recommend you to follow the reconstitution protocol provided in the COA.

Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower. Please avoid repeated freeze-thaw cycles. No activity loss is observed after storage at: 4-8°C for 12 months in lyophilized state; -70°C for 3 months under sterile conditions after reconstitution.

Bioactivity-ELISA
Immobilized Anti-Human MSLN MAb at 0.5 μg/mL (100 μL/well) can bind Biotinylated Human Mesothelin (296-580), His Tag, primary amine labeling (Cat. No. MSN-H8223) with a linear range of 0.5-8 ng/mL (QC tested).

FACS Analysis of Anti-MSLN CAR Expression
293 cells were transfected with anti-MSLN-scFv and RFP tag. 2e5 of the cells were first stained with B. Biotinylated Human Mesothelin (296-580), His Tag, primary amine labeling (Cat. No. MSN-H8223, 3 µg/mL) and C. Biotinylated Protein Control, followed by FITC Streptavidin. A. Non-transfected 293 cells and C. Biotinylated Protein Control were used as negative control. RFP was used to evaluate CAR (anti-MSLN-scFv) expression and FITC was used to evaluate the binding activity of Biotinylated Human Mesothelin (296-580), His Tag, primary amine labeling (Cat. No. MSN-H8223).

References

(1) Chang K., et al., 1996, Proc. Natl. Acad. Sci. U.S.A. 93:136-140.
(2) Yamaguchi N., et al., 1994, J. Biol. Chem. 269:805-808.
(3) Rump A., et al., 2004, J. Biol. Chem. 279:9190-9198.
(4) Ma J., et al., 2012, J. Biol. Chem. 287:33123-33131.