Recombinant Rat TWEAK Protein (Fc Tag)

Name: Recombinant Rat TWEAK Protein (Fc Tag)
Brand: Beta LifeScience
SKU: BLPSN-4701
Availability: InStock

Collections: Cytokines and growth factors, Recombinant proteins, Tumor necrosis factors and receptors (tnfs)

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Product Overview

Tag	Fc
Host Species	Rat
Accession	NP_001001513.2
Description	A DNA sequence encoding the rat TNFSF12 (Arg105-His249) was expressed with Fc region of human IgG1 at the N-terminus.
Source	HEK293
Predicted N Terminal	Glu
AA Sequence	Arg105-His249
Molecular Weight	The recombinant rat TNFSF12 comprises 405 a.a. and predicts a molecular mass of 44.4 kDa. The apparent molecular mass of the recombinant protein is approximately 49 kDa in SDS-PAGE under reducing conditions due to glycosylation.
Purity	>85% as determined by SDS-PAGE
Endotoxin	< 1.0 EU per μg of the protein as determined by the LAL method
Bioactivity	1. Measured in a cell proliferation assay using HUVEC human umbilical vein endothelial cells. The ED50 for this effect is typically 5-20 ng/mL. 2. Immobilized Fc-rat TNFSF12 at 10 ug/ml (100 ul/well) can bind biotinylated human Fc-TNFRSF12A, The EC50 of biotinylated human Fc-TNFRSF12A is 0.12-0.28 ug/ml.
Formulation	Lyophilized from sterile PBS, pH 7.4 .
Stability	The recombinant proteins are stable for up to 1 year from date of receipt at -70°C.
Usage	For Research Use Only
Storage	Store the protein under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

FAQs

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.