Recombinant Human OX40 Ligand / TNFSF4 Protein, Fc Tag, premium grade, 100 µg

Background
Tumor necrosis factor ligand superfamily member 4 (TNFSF4) is also known as glycoprotein Gp34, OX40 ligand (OX40L), TAX transcriptionally-activated glycoprotein 1 and CD252, which belongs to the tumor necrosis factor family. TNFSF4 is the ligand for CD134 and is expressed on such cells as DC2s (a subtype of dendritic cells) enabling amplification of Th2 cell differentiation. The interaction of TNFSF4-TNFSF4 is involved in the pathogenesis of multiple autoimmune and inflammatory diseases such as systemic lupus erythematosus (SLE), carotid artery disease and cancer. Furthermore, similar to other TNF superfamily members, membrane-bound OX40 Ligand (TNFSF4) exists as a homotrimer. Human TNFSF4 shares 46% amino acid sequence identity with its mouse counterpart.

Source
Recombinant Human OX40 Ligand, Fc Tag, premium grade(OXL-H5266) is expressed from human 293 cells (HEK293). It contains AA Gln 51 - Leu 183 (Accession # P23510-1).
Predicted N-terminus: Pro
It is produced under our rigorous quality control system that incorporates a comprehensive set of tests including sterility and endotoxin tests. Product performance is carefully validated and tested for compatibility for cell culture use or any other applications in the early preclinical stage. When ready to transition into later clinical phases, we also offer a custom GMP protein service that tailors to your needs. We will work with you to customize and develop a GMP-grade product in accordance with your requests that also meets the requirements for raw and ancillary materials use in cell manufacturing of cell-based therapies.

Molecular Characterization
This protein carries a human IgG1 Fc tag at the N-terminus
The protein has a calculated MW of 74.0 kDa. The protein migrates as 140-200 kDa under non-reducing (NR) condition (SDS-PAGE) due to glycosylation.

Endotoxin
Less than 0.01 EU per μg by the LAL method.

Sterility
The sterility testing was performed by membrane filtration method.

Mycoplasma
Negative.

Purity
>90% as determined by SDS-PAGE.
>90% as determined by SEC-MALS.

Formulation
Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 100 mM Glycine, 25 mM Arginine, 150 mM NaCl, pH7.5 with trehalose as protectant.

Reconstitution
Please see Certificate of Analysis for specific instructions.
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
Please refer to product data sheet.

Clinical and Translational Updates

(1)  "The prognostic value of a combined immune score in tumor and immune cells assessed by immunohistochemistry in triple-negative breast cancer"
Choi, Lee, Jin et al
Breast Cancer Res (2023) 25 (1), 134
(2)  "Construction and validation of a immune-related prognostic gene DHRS1 in hepatocellular carcinoma based on bioinformatic analysis"
Xu, Wang, Meng et al
Medicine (Baltimore) (2023) 102 (42), e35268
(3) "Ferroptosis-related lncRNAs guiding osteosarcoma prognosis and immune microenvironment"
Yang, Su, Xu et al
J Orthop Surg Res (2023) 18 (1), 787
Showing 1-3 of 954 papers.