PODS™ Human TGF-β3 crystals provide a depot of proteins which are steadily secreted. It has been estimated that the biological activity of 50 million PODS™ crystals generates the same peak dose as 3.3 µg of standard recombinant protein. However, at 5 days following the start of seeding the PODS™ crystals, there are more than 50% of these peak levels still present in the culture system. Ultimately, the amount of PODS™ crystals that is optimal for a particular experiment should be determined empirically, using 50 million PODS™ crystals equivalence to 3.3 µg of standard growth factor is a good starting point. To control for cross-reactivity with cells or as a negative control, we recommend using PODS™ growth factors alongside PODS™ Empty crystals, as the latter do not contain or release cargo protein.
- Applications:cell culture growth factors
- Applications:PODS™ protein crystals may be reconstituted at 200 million PODS™/ml in water. 20% glucose has a buoyant density closer to PODS™ protein crystals and can be useful for aliquoting. PODS™ protein crystals are highly stable when stored in aqueous solution (pH
Peptides & proteins
Transforming Growth Factor beta 3, TGF beta 3, TGF-β-3, TGFB3, TGFbeta3
1) Coulibaly, F. et al. The molecular organization of cypovirus polyhedra. (2007) Nature. 446: 97-101.; 2) Rey FA. Virology: Holed up in a natural crystal. (2007) Nature. 446: 35-37.; 3) Mori H. Immobilization of Bioactive Growth Factors into Cubic Proteinous Microcrystals (Cypovirus Polyhedra) and Control of Cell Proliferation and Differentiation. (2010) NSTI-Nanotech. 3: 222-225.; 4) Abe, S. et al. Design of Enzyme-Encapsulated Protein Containers by In-Vivo Crystal Engineering. (2015) Advanced Materials. 27(48): 7951-7956.
Upon receipt, store at 4°C. PO
SOURCE: Spodoptera frugiperda (Sf9) cell culture; LENGTH: 158 aa; STRUCTURE: Dimer; FORMAT: lyophilized; ENDOTOXIN LEVEL: <0.06 EU/ml as measured by gel clot LAL assay; BACKGROUND: Transforming Growth Factors (TGFs) are multifunctional peptides that regulate growth and differentiation in most cell types. The TGF-β family of proteins signal through serine/threonine kinase receptors. TGF-β isoforms (TGF-β1, -β 2, and -β 3) have overlapping, yet distinct biological actions in developing and adult tissues. TGF-β3 is an important factor in regulating cell adhesion and accelerating wound repair. TGF-β3 also functions during osteoblast proliferation, chemotaxis, and collagen synthesis.