Abbreviation
Recombinant Human FGF21 protein (Active)
Purity
>96% 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 thymidine uptake assay using FGF-receptors transfected BaF3 cells is less than 0.5 μg/ml, corresponding to a specific activity of >2.0x103 IU/mg in the presence of 5 ug/ml of rMuKlotho-β and 10 μg/ml of heparin.
Alternative Names
FGF 21; FGF-21; Fgf21; FGF21_HUMAN; FGFL; Fibroblast growth factor 21; PRO10196; UNQ3115
Species
Homo sapiens (Human)
Expression Region
29-209aa
Target Protein Sequence
HPIPDSSPLL QFGGQVRQRY LYTDDAQQTE AHLEIREDGT VGGAADQSPE SLLQLKALKP GVIQILGVKT SRFLCQRPDG ALYGSLHFDP EACSFRELLL EDGYNVYQSE AHGLPLHLPG NKSPHRDPAP RGPARFLPLP GLPPALPEPP GILAPQPPDV GSSDPLSMVG PSQGRSPSYA S
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.
Protein Length
Full Length of Mature Protein
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
Lyophilized from a 0.2 µm filtered PBS, pH 7.4
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
FGF21 functions as a key metabolic hormone that signals through FGFR1c/β-Klotho complexes to regulate glucose homeostasis, lipid metabolism, and energy balance—making it a high-value target in both metabolic disease and tumor biology research. This tag-free recombinant human FGF21, covering the full mature sequence (residues 29–209), demonstrates confirmed receptor-binding potency with an ED50 below 0.5 μg/ml in a β-Klotho-dependent BaF3 proliferation assay, corresponding to a specific activity exceeding 2.0 × 10³ IU/mg—data that supports use in cell proliferation assays, receptor-ligand binding studies via SPR or ELISA, and in vivo tumor biology models. The E. coli expression system produces a non-glycosylated protein, which provides a suitable basis for structure-function studies where glycan-independent signaling needs to be isolated. Endotoxin levels below 1.0 EU/μg and purity above 96% by SDS-PAGE together satisfy the criteria typically required for sensitive cell-based assays and antibody characterization workflows.