Purified Recombinant Human/Mouse/Rat Activin A (>98%)
This biotinylated antigen affinity purified polyclonal antibody has been 0.2 µm filtered and lyophilized from modified Dulbecco’s phosphate buffered saline (1X PBS) pH 7.2 – 7.3 containing 50 µg of bovine serum albumin per µg of antibody with no calcium, magnesium, or preservatives present.
Storage and Handling
The lyophilized, biotinylated antigen affinity purified polyclonal antibody can be stored desiccated at -20°C to -70°C for up to twelve months from date of receipt. The reconstituted bioin conjugate can be stored for at least four weeks at 2-8°C. For long-term storage of the reconstituted conjugate, aseptically aliquot into working volumes and store at -20°C to -70°C in a manual defrost freezer. Avoid Repeated Freeze Thaw Cycles. No detectable loss of activity was observed after six months.
Country of Origin
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Applications and Recommended Usage?
Quality Tested by Leinco
Western Blotting: To detect Human/Mouse/Rat Activin A this biotin conjugate can be used at a concentration of 0.1 - 0.2 µg/ml. This biotin conjugate should be used in conjunction with compatible second-step reagents such as PN:A106 and a chromogenic substrate such as PN:T343. The detection limit for Human/Mouse/Rat Activin A is 5 ng/lane under either reducing or non-reducing conditions. The sensitivity of detection may increase up to 50 fold when a chemiluminescent substrate is used. A suitable Western blotting control is PN:A213.
Each investigator should determine their own optimal working dilution for specific applications. See directions on lot specific datasheets, as information may periodically change.
Goat Anti-Human Activin A recognizes Human Activin A. This antigen affinity purified polyclonal antibody was purified using a proprietary chromatographic technique that includes covalently immobilizing the antigen proteins or peptides to agarose based beads. This purification method enhances specificity, reduces nonspecific binding of extraneous IgG and provides you with the most reliable reagent available for your early discovery research.
Activin A is a member of the TGF beta super family. It was originally identified and isolated because it stimulates the release of follicle-stimulating hormone (FSH). Activins are structurally related to inhibins, they share common beta subunits, but they exhibit opposite biological activities. Activins are homodimers of beta subunits and inhibins are heterodimers of an alpha subunit and a beta subunit. Since the initial discovery of Activin A, it has been shown to regulate cell differentiation, nerve cell survival, bone growth promotion, cell proliferation, and apoptosis. Activin A expression has been detected in prostate cancer, colon cancer and breast cancer. Because Activin A is able to inhibit cell proliferation by modulating the Rb pathway, it is thought to inhibit cancer development. This may not be the only mechanism by which activin may play a preventative role in cancer development. Activin has also been shown to increase the expression of a protein whose decreased expression is correlated with increased metastatic capacity. In addition, activin has an inhibitory effect on endothelial cell growth and can thereby block angiogenesis, preventing tumor growth and metastasis. The activin/inhibin nomenclature reflects the subunit composition of the proteins: activin A (βA - βA), activin B (βB - βB), activin AB (βA - βB), inhibin A (α - βA) and inhibin B (α - βB). At present, little is known about the contribution of the other β subunits to activin or inhibin formation and biology. At the amino acid sequence level, the mature human βA subunit is 100% identical to mouse βA, while the human and mouse α subunits share approximately 80% identity. Similarly to other TGF-β family members, activins exert their biological activities through binding to the heterodimeric complex composed of two membrane spanning serine-threonine kinases designated type I and type II. Two forms of activin receptor type I (Act RI-A and Act RI-B) and two forms of activin receptor type II (Act RII-A and Act RII-B) have been identified. Activin binds directly to Act RII, the complex then associates with Act RI and initiates signaling.
Products are for research use only. Not for use in diagnostic or therapeutic procedures.