ActoFactor™ Recombinant Human Activin A receptor, type I (Plant)

Specification
Recommended Products

Cat.No.

CSC-CTK0115

Description

Activins are homodimers or heterodimers of the various β subunit isoforms, belonging to the TGF-beta family. Mature Activin B has two chains of 123 amino acid residues (betaB-betaB). Activin exhibits a wide range of biological activities, including mesoderm induction, neural cell differentiation, bone remodelling, haematopoiesis, and reproductive physiology. Activins plays a key role in the production and regulation of hormones such as FSH, LH, GnRH and ACTH. Inhibins/Activins are proteins that are formed by the dimerization of two subunits, i. e. an α (alpha) with either beta A (βA) – Inhibin A or beta B (βB) – Inhibin B. The subunits betaA and betaB can also form homodimers or heterodimers called Activin: Activin A (betaA -betaA), Activin B (betaB -betaB) and Activin AB (betaA -betaB). The Activin gene family comprises the additional, but poorly characterized members' Activin betaC (βC), beta D (βD) and beta E (βE). As with other members of the super-family, Activins interact with two types of cell surface trans- membrane receptors (Types I and II) which have intrinsic serine/threonine kinase activities in their cytoplasmic domains, Activin type 1 receptors, ACVR1, ACVR1B, ACVR1C and Activin type 2 receptors. Recombinant human Activin B is a polypeptide chain containing 123 amino acids (293-406; P09529INHBB_HUMAN) and a His-tag at the N-terminal end. It has a predicted molecular mass of 14 kDa. Human recombinant Activin B expressed in Nicotiana benthamiana is produced by transient expression in non-transgenic plants and is purified by sequential chromatography (FPLC). This product does not contain any animal–derived components or impurities.

Species

Human

Product Overview

Human ACVR1 expressed in Nicotiana benthamiana

Molecular Mass

14 kDa

Size

CAT# CSC-CTK0115-10 (10 μg); CAT# CSC-CTK0115-50 (50 μg)

Expression System

Nicotiana benthamiana

Purity

Greater than 97% as determined by SDS-PAGE analysis.

Activity

The biological activity of Activin B is measured by its ability to inhibit mouse plasmacytoma cell line (MPC-11) cells proliferation. An ED50 <5 ng/ml is required to stimulate a half-maximal response at cytokine saturation. Note: Since applications vary, each investigator should titrate the reagent to obtain optimal results.

Endotoxin Level

Less than 0.04 EU/μg.

Formulation

Lyophilized from a concentrated, sterile protein solution in 0.05 M Tris-HCl buffer (pH 7.4).

Reconstitution

Please centrifuge product briefly before opening vial. The lyophilized protein should be reconstituted in sterile, ultra-pure water to a concentration of 50 μg/ml. This solution can then be diluted into other aqueous buffers and stored at -20°C for future use. At higher concentrations the solubility may be reduced and multimers generated. Optimal concentration should be determined for specific application and cell lines.

Storage & Stability

The lyophilized protein, though stable at room temperature for up to 3 weeks, is best stored desiccated at -20°C. Reconstituted protein should be used immediately or stored long-term in undiluted working aliquots at -20°C. For long-term storage, it is recommended to add a carrier protein (0.1% HSA or BSA). Avoid repeated freeze-thaw cycles.

Citation Guidance

If you use this products in your scientific publication, it should be cited in the publication as: Creative Bioarray cat no. If your paper has been published, please click here to submit the PubMed ID of your paper to get a coupon.

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