Recombinant Human TNF protein(NP_000585.2)(Leu 25-Ser 645), fused to C-Fc Tag, was expressed in HEK293.
Expression System
HEK293
Species
Human
Tag
C-Fc Tag
Form
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.
Molecular Mass
The protein has a calculated MW of 94.7 kDa. The protein migrates as 110-140 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
Protein length
Leu 25-Ser 645
Endotoxin
Less than 1.0 EU per μg by the LAL method.
Purity
>95% as determined by SDS-PAGE. >90% as determined by SEC-MALS.
Storage
For long term storage, the product should be stored at lyophilized state at -20°C or lower. Please avoid repeated freeze-thaw cycles. This product is stable after storage at: -20°C to -70°C for 12 months in lyophilized state; -70°C for 3 months under sterile conditions after reconstitution.
Reconstitution
It is recommended that sterile water be added to the vial to prepare a stock solution of 0.2 ug/ul. Centrifuge the vial at 4°C before opening to recover the entire contents.
SDS-PAGE
SEC-MALS 1
Bioactivity-ELISA 1
Immobilized Human EGF, Tag Free at 10 μg/mL (100 μL/well) can bind Human EGF R, Fc Tag with a linear range of 0.078-2.5 μg/mL.
Bioactivity-ELISA 2
Immobilized Human EGF R, Fc Tag at 1 μg/mL (100 μL/well) can bind Cetuximab with a linear range of 0.1-2 ng/mL.