What isoforms does the TGF-β Antibody #3711 detect and will it detect the 25kDa mature form of TGF-β?

The TGF-β Antibody #3711 detects recombinant TGF-β1, TGF-β2, and TGF-β3. The antibody also detects endogenous levels of the TGF-β1 precursor proteins. The different sizes we have listed represent the precursor TGF-β protein (45kDa), the mature dimer form (25kDa) and the monomer (12kDa).

We do not usually detect the mature TGF-β at 25 kDa because mature TGF-β is composed of two polypeptides that are disulfide-linked. Therefore under reducing conditions, these polypeptides are separated and observed as a single band at 12 kDa. However, we have shown that the TGF-β Antibody #3711 can detect the mature form of TGF-β by using recombinant protein.

TGF-β is rapidly exported from the cell and therefore may be difficult to detect in tissue or cell lysates. In human platelet samples, we observe two strong bands, with the larger band likely being the precursor (uncleaved) form at 45kDa and the smaller being the monomer at 12kDa.

Last updated: September 12, 2024