Abbreviation
Recombinant Human CD40LG protein (C194W), partial (Active)
Purity
>95% as determined by SDS-PAGE.
Endotoxin
Less than 1.0 EU/μg as determined by LAL method.
Activity
Fully biologically active when compared to standard. The ED50 as determined by the dose-dependent stimulation of IL-8 production by human PBMC is less than 5-10 ng/ml.
Alternative Names
CD 40L; CD154; CD40 antigen ligand; CD40 ligand; CD40 ligand; soluble form; CD40-L; CD40L; CD40L_HUMAN; CD40LG; gp39; hCD40L; HIGM1; IGM; IMD3; T B cell activating molecule; T BAM; T-cell antigen Gp39; TNF-related activation protein; TNFSF5; TrAP; Tumor necrosis factor (ligand) superfamily member 5; Tumor necrosis factor ligand superfamily member 5
Species
Homo sapiens (Human)
Expression Region
113-261aa(C194W)
Target Protein Sequence
MQKGDQNPQI AAHVISEASS KTTSVLQWAE KGYYTMSNNL VTLENGKQLT VKRQGLYYIY AQVTFCSNRE ASSQAPFIAS LWLKSPGRFE RILLRAANTH SSAKPCGQQS IHLGGVFELQ PGASVFVNVT DPSQVSHGTG FTSFGLLKL
Note: The complete
sequence may include tag sequence, target protein sequence, linker sequence and extra sequence that is
translated with the protein sequence for the purpose(s) of secretion, stability, solubility, etc.
If the exact amino acid sequence of this recombinant protein is critical to your application,
please explicitly request the full and complete sequence of this protein before ordering.
Tag Info
Tag-Free
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Buffer
0.2 μm filtered PBS, pH 7.0 ,lyophilized
Lead Time
5-10 business days
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Notes
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Datasheet & COA
Please contact us to get it.
Description
The C194W substitution in this partial human CD40LG (residues 113–261) stabilizes the trimeric structure without requiring eukaryotic post-translational modifications, enabling robust E. coli expression of a tag-free, biologically active ligand. Validated potency is confirmed by an ED50 below 5–10 ng/ml in dose-dependent IL-8 stimulation of human PBMCs, supporting use in B cell activation and differentiation assays, NF-κB signaling pathway studies, and functional screening during anti-CD40L antibody development. Endotoxin levels below 1.0 EU/μg minimize LPS-driven artifacts that confound immune cell readouts, making this protein appropriate for PBMC proliferation assays, in vivo tumor immunology models, and as a reference standard in CD40LG detection platforms. Purity exceeding 95% by SDS-PAGE, combined with this stringent endotoxin control, satisfies the criteria typical for cell-based functional studies where cytokine-specific effects must be clearly distinguished from innate immune activation.