IFNG is produced mainly by T cells and natural killer cells activated by antigens, mitogens or alloantigens and by lymphocytes expressing the surface antigens CD4 and CD8. Receptors for IFNG are expressed on all types of human cells with the exception of mature erythrocytes. IFNG-receptor complexes are rapidly internalized by endocytosis. In addition to its antiviral and antiparasitic activities, IFNG also inhibits the proliferation of a number of normal and transformed cells. The growth inhibitory activities of IFNG are in fact, more pronounced than those of the other interferons. However, the main biological activity of IFNG appears to be immunomodulatory in contrast to the other interferons that are mainly antiviral.
Alternative Names
T cell interferon ; MAF ; IFN-gamma ; Immune interferon ; IFNG ; type II interferon
Quantity
100 µg
Regulatory
RUO
Source
E. coli
Host
Human
Endotoxin Level
<1.0 EU/μg of recombinant protein as determined by the LAL method
Biological Activity Comment
The ED50 was found to be ≤ 0.5ng/ml as determined by its ability to induce dose dependent proliferation in vascular smooth muscle cells.
Weight
17.0 kDa
Description
A quick spin of the vial followed by reconstitution in 20mM acetic acid not less than 0.1 mg/mL.
Format
Lyophilized PowderLyophilized from a 0.2 μm filtered solution in sodium phosphate and NaCl (pH 8.0)
Purity
>95% as determined by SDS-PAGE
Storage
The lyophilized protein is stable for at least one year from date of receipt at -70°C. Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.