LEFTYA (Left-right Determination Factor 2, Protein Lefty-2, Left-right Determination Factor A, Protein Lefty-A, Transforming Growth Factor beta-4, TGF-beta-4, Endometrial Bleeding-associated Factor, EBAF, LEFTA, LEFTY2,

Mab

IgG2a, k

-20°C

Supplied as a liquid in 0.02M PBS, pH 7.2, 0.01% sodium azide.

Recombinant corresponding to human LEFTY2.

During vertebrate embryogenesis, a left-right axis is established. Secreted growth factors of the TGF-beta family, including gene products derived from nodal, lefty-1 and lefty-2, play crucial roles in establishing left-right asymmetries. TGF-beta (Transforming growth factor-beta) is a pleiotropic cytokine that regulates growth and differentiation of diverse types of cells. TGF-beta actions are directed by ligand-induced activation of TGF-beta receptors. Complexes formed move into the nucleus, where they act as components of a transcriptional complex. Lefty, a novel member of the TGF-beta superfamily, inhibits TGF-beta signaling. Lefty acts to inhibit phosphorylation of Smad2 following activation of the TGF-beta receptor. Lefty also inhibits events downstream from R-Smad phosphorylation. Lefty provides a repressed state of TGF-beta-responsive genes. The Lefty family is comprised of Lefty 1 and Lefty 2 in mouse, and Lefty A and Lefty B in humans. Members of the TGF-beta superfamily require processing for their activation. Cleavage is therefore an essential step for Lefty activation. Lefty is synthesized as a large inactive precursor (42kD) that must be endoproteolytically processed to release the bioactive polypeptide (28kD and 34kD forms). The 28kD form induces MAPK activity.

Applications:
Suitable for use in ELISA, Western Blot and Immunohistochemistry. Other applications not tested.

Recommended Dilution:
Immunohistochemistry (Formalin fixed paraffin embedded): 10ug/ml
Optimal dilutions to be determined by the researcher.

Hybridoma:
Sp2/0 myeloma cells with spleen cells from Balb/c mice.

Storage and Stability:
May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.