Active Recombinant Human Activin B

• Cat.No.: Activin B-59H
• Product Overview: The human prepro-Activin βA chain (amino acid residues 1 - 310) was fused to the human mature Activin βB chain (Mason, A.J. et al., 1986, Biochem. Biophys. Res. Comm. 135:957 - 964). The chimeric protein was expressed in CHO cells.

Specification

• Description: Activins, members of the TGF-beta superfamily, are disulfide-linked dimeric proteins originally purified from gonadal fluids as proteins that stimulated pituitary follicle stimulating hormone (FSH) release. Activin proteins have a wide range of biological activities, including mesoderm induction, neural cell differentiation, bone remodeling, hematopoiesis and roles in reproductive physiology. Activin isoforms and other members of the TGF-beta superfamily exert their biological effects by binding to heteromeric complexes of a type I and a type II serine-threonine kinase receptor, both of which are essential for signal transduction.Activins are homodimers or heterodimers of the various beta subunit isoforms, while inhibins are heterodimers of a unique alpha subunit and one of the various beta subunits. Five beta subunits (mammalian beta A, beta B, beta C, beta E and Xenopus beta D) have been cloned to date. The activin/inhibin nomenclature reflects the subunit composition of the proteins: Activin A (beta A - beta A), Activin B (beta B - beta B), Activin AB (beta A - beta B), Inhibin A (alpha - beta A) and Inhibin B (alpha - beta B).
• Source: CHO cells
• Species: Human
• Bio-activity: Measured by its ability to induce hemoglobin expression in K562 cells (Schwall, R.H. et al., 1991, Method Enzymol. 198:340).
• Molecular Mass: Recombinant human mature Activin B is a disulfide-linked homodimer of two βB subunits. Each monomer contains 115 amino acid residues and has a calculated molecular mass of approximately 14.5 kDa.
• Endotoxin: < 1.0 eu per 1 μg of the cytokine as determined by the lal
• Purity: >90%, as determined by SDS-PAGE and visualized by silver stain
• Storage: Lyophilized samples are stable for up to six months at -20° C to -70° C. Upon reconstitution, this cytokine, in the presence of a carrier protein, can be stored under sterile conditions at 2 - 8° C for one month or at -20° C to -70° C in a manual defrost freezer for three months without detectable loss of activity. Avoid repeated freeze-thaw cycles.
• Reconstitution: It is recommended that sterile PBS containing at least 0.1% human serum albumin or bovine serum albumin be added to the vial to prepare a stock solution of no less than 10 μg/mL.

Reviews

09/05/2022

The protein product's efficacy has been validated by numerous independent research studies, solidifying its reputation as a highly effective reagent.

11/23/2021

The company values customer satisfaction and has shown a commitment to providing exceptional support throughout our interactions.

04/26/2021

The company employs rigorous quality control measures to ensure batch-to-batch consistency, guaranteeing reliable and reproducible outcomes.

07/25/2019

The protein product is produced using advanced manufacturing processes and stringent quality standards, ensuring its integrity and reliability.

07/03/2017

We have never experienced any issues with damage or contamination during shipping, thanks to the company's careful packaging and handling procedures.

Q&As

What is the significance of the upregulation of activin-B and follistatin in IPF?

The upregulation of activin-B and follistatin in IPF is a novel finding, suggesting their involvement in the disease.

What is the purpose of developing activin B-loaded hydrogels?

The purpose of developing activin B-loaded hydrogels is to achieve sustained release of activin B over an extended period.

What does Activin B induce in BMSCs?

Activin B induces stress fiber formation and migration of BMSCs.

How long does the sustained release of activin B from the hydrogels last?

The sustained release of activin B from the hydrogels lasts for over 5 weeks.

What benefits have been observed with the activin B-loaded hydrogels?

The activin B-loaded hydrogels have shown substantial cellular protection and behavioral improvement.

In what way could activin inhibition be useful in IPF?

Activin inhibition could be useful in reducing the alveolar cellular response to injury in IPF.

Does combining serum activin B concentration with free β-hCG improve the diagnostic potential for differentiating tubal ectopic pregnancy from normal pregnancy?

Yes, combining serum activin B concentration with free β-hCG improves the diagnostic potential for distinguishing tubal ectopic pregnancy from normal pregnancy.

Is activin B found naturally in the body?

Yes, activin B is produced endogenously in the body and is present in various tissues and fluids, including follicular fluid.

What is the difference in serum activin B concentration between tubal ectopic pregnancy (tEP) and normal pregnancy?

The serum activin B concentration is lower in tubal ectopic pregnancy compared to normal pregnancy.

Is serum activin B concentration reliable in distinguishing tubal ectopic pregnancy from intrauterine miscarriage (IUM)?

Serum activin B concentration cannot reliably distinguish tubal ectopic pregnancy from intrauterine miscarriage (IUM).

Can serum activin B concentration differentiate tubal ectopic pregnancy from normal pregnancy with high accuracy?

Serum activin B concentration can discriminate tubal ectopic pregnancy from normal pregnancy with moderate accuracy.

What condition or disease is being targeted with the activin B-loaded hydrogels?

The activin B-loaded hydrogels are being considered as a therapeutic strategy for Parkinson's disease.

What is activin B?

Activin B is a member of the activin family, which is a group of growth and differentiation factors involved in various biological processes.

How does the activity of purified activin B compare to other activins?

The purified activin B showed lower activity compared to other activins in various assay systems, such as follicle-stimulating hormone secretion and gonadotropin receptor expression.

Is activin inhibition effective for antifibrotic therapy in IPF?

No, it indicate that activin inhibition is not an efficient tool for antifibrotic therapy in IPF.

What are the implications of the activin B-follistatin complex in porcine follicular fluid?

In porcine follicular fluid, the activin B-follistatin complex was found to be present in equimolar amounts, suggesting a tight interaction between the two proteins.

What is the potential of the activin B-loaded hydrogels in the context of Parkinson's disease?

The findings suggest that the activin B-loaded hydrogels have the potential to be an effective therapeutic strategy for Parkinson's disease, based on the observed cellular protection and behavioral improvement.

Can activin-B and follistatin levels serve as biomarkers of IPF?

Yes, activin-B and follistatin levels may be useful as biomarkers for IPF.

What are the biological functions of activin B?

Activin B has been implicated in various biological functions, including embryonic development, cell differentiation, tissue repair, and regulation of hormone secretion.

How does activin B form a complex with follistatin?

Activin B can bind to follistatin, an activin-binding protein, to form a complex. This interaction helps regulate the activity and availability of activin B.