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Recombinant Human Activin A Protein

Activin A  

Human Activin-A is a 26 kDa disulfide-linked homodimer of two beta A chains, each containing 116 amino acid residues. Activin-A is a TGF-beta family member with a wide range of biological activities including regulation of cellular proliferation and differentiation, and promotion of neuronal survival. The biological activities of Activin-A can be counteracted by inhibins and also by the diffusible TGF-beta antagonist, Follistatin.


ED50 is 0.3 - 1.8 ng/ml h-Activin A using MPC-11 cells. In addition to our standard assay, the activity of this prodcut has been verified in the lab of Dr Josué MFOPOU KUNJOM (VUB - Diabetes Research Centre) -  by analysis of  of CXCR4 in definitive endoderm

116 αα  26 kDa P08476
>95% E. coli -20oC

Physical Appearance

Sterile Filtered white lyophilized (freeze-dried) powder.


Lyophilized product is very stable at -20°C. Reconstituted material should be aliquoted and frozen at -20°C. It is recommended to add a carrier protein (0.1% HSA or BSA) for long term storage


Centrifuge vial before opening. When reconstituting the product, gently pipet and wash down the sides of vial to ensure full recovery of the protein into solution. It is recommended to reconstitute the lyophilized product with sterile water at a concentration of 0.1mg/ml, which can be further diluted into other aqueous solutions.


Activin A was lyophilized from a volatile solution after reverse phase chromatography

Protein Content Determined by

UV spectroscopy at 280 nm.Analysis by RP-HPLC calibrated against a known standard.Quantitation on SDS-PAGE against a known standard


Endotoxin level as measured by LAL is <0.01ng/ug or <0.1EU/ug.

Alternative Names

EDF (erythroid differentiation factor); FRP (Follicle stimulating hormone releasing protein)