Transforming Growth Factor beta1 (TGFb1) activities include proliferation, angiogenesis and promotion or inhibition of many immune events. TGFb1 is produced by a number of cell types including regulatory T cells, fibroblasts, epithelial cells, and endothelial cells (3). TGFb1 binds to TBRII homodimer, which then complexes with TBRI homodimer. The oligomeric receptor complex phosphorylates subsets of the SMAD proteins that then act to induce and repress a number of target genes. TGFb1 binding can also activate the Erk2, p38, and JNK pathways via TAK1. TGFb1 appears to promote late stage progression and metastasis in some cancers.
Recombinant human TGFb1 contains no "tags" and the nonglycosylated protein has a calculated MW of 12,794. DTT-reduced protein migrates as a 13kD polypeptide and the non-reduced cystine-linked homodimer migrates as a 25kD protein. The expected amino-terminal ALDTN of recombinant human TGFb1 was verified by amino acid sequencing.
Bioactivity:Determined by assessing inhibition of IL-4 induced HT-2 cell proliferation. The ED50 is between 0.04-0.20ng/ml.
Storage and Stability:Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile 20mM citrate, pH 3. Use immediately. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
仕様
Size：10ug
Source Antigen：Recombinant, Human 293 cells
Grade：Highly Purified
Purity：≥98% by SDS-PAGE of 6ug reduced (+) and non-reduced (-) recombinant human TGFb1. <1% migrates as monomer human TGFb1 under non-reduced (-) conditions. Endotoxin: ≤0.01ng/ug
Form：Supplied as a lyophilized powder from 20mM citrate, pH 3.0, 100mM sodium chloride. Reconstitute with sterile 20mM citrate, pH 3 to ≥50ug/ml. May add protein to solution to minimize absorption of human TGFb1 to surfaces. Solubilize for 30 minutes at RT with occasional gentle vortexing.
