Follistatin-344 (1mg) – Premium Research Grade Myostatin Antagonist

Welcome to Liaocheng Yixin Company, your trusted source for premium follistatin-344 1mg for research. As a licensed peptide synthesis manufacturer operating from our facility in Shandong Province, China, we provide high-quality research compounds for the global scientific community.

Follistatin-344 is a 344-amino-acid precursor isoform of the follistatin protein family, studied for its ability to bind and neutralize members of the transforming growth factor-beta (TGF-β) superfamily, particularly myostatin and activins . Unlike classical signaling hormones, Follistatin functions as a binding protein that sequesters these ligands, preventing receptor engagement and modulating downstream signaling cascades . Our follistatin-344 1mg for research offers investigators a reliable, high-purity compound for advanced muscle biology, neuromuscular disease, and tissue plasticity studies.   follistatin-344 1mg for research

What is Follistatin-344?

Follistatin-344 is a precursor isoform encoded by the FST gene that undergoes intracellular processing before secretion. It contains a signal peptide and core functional domains arranged to facilitate ligand interaction. The precursor undergoes proteolytic processing to generate shorter, biologically active forms such as Follistatin-315 . Structural analysis suggests that follistatin proteins contain multiple follistatin domains (FSDs), each contributing to high-affinity binding with TGF-β superfamily ligands .  follistatin-344 1mg for research

Key identifiers:

• Class: Myostatin inhibitor, activin-binding protein

• Target: Myostatin (GDF-8), activin A, activin B, select BMPs

• Mechanism: Ligand sequestration, steric blocking of receptor engagement

• Related Isoforms: Follistatin-315 (mature circulating form)

• Purity: ≥99% verified by HPLC

Mechanism of Action in Research

Follistatin-344 operates through a well-characterized ligand sequestration mechanism that distinguishes it from receptor antagonists :

Myostatin Neutralization

Follistatin binds myostatin (also known as growth differentiation factor-8), a negative regulator of skeletal muscle growth that activates SMAD2/3-dependent transcriptional programs constraining myogenic differentiation . By binding myostatin, Follistatin limits receptor-mediated signaling, releasing the brake on muscle growth. Research demonstrates that follistatin has emerged as a powerful antagonist of myostatin that can increase muscle mass and strength .

Activin Sequestration

Follistatin also binds activins, which participate in reproductive endocrinology, inflammatory signaling, and tissue repair processes . Crystallographic investigations suggest Follistatin may envelope activin dimers, preventing them from interacting with type II activin receptors . This sequestration strategy represents a broader regulatory paradigm in which binding proteins fine-tune morphogen gradients within the organism.

Structural Distinctiveness

The distinction between Follistatin-344 and other isoforms (such as Follistatin-288) lies in differential C-terminal processing and heparan sulfate binding affinity. These isoform-specific features may influence tissue distribution, extracellular matrix interactions, and temporal availability . Research indicates that Follistatin-344 overexpression in muscle tissue can increase skeletal muscle mass through myofiber hypertrophy .  follistatin-344 1mg for research

Scientific Research Applications

Muscle Growth and Neuromuscular Disease Research

Follistatin-344 is a cornerstone research tool for investigating myostatin pathway inhibition. Translational studies demonstrate increased muscle size and strength in species ranging from mice to monkeys following FS344 delivery . Research in transgenic pigs exogenously expressing FST specifically in muscle tissue showed an increased proportion of skeletal muscle and reduced body fat . Preclinical data clearly demonstrate the potential for blocking the myostatin pathway in genetic muscle disorders and acquired conditions such as sporadic inclusion body myositis .

Endocrine and Reproductive System Research

Follistatin was originally identified as an activin-binding protein modulating follicle-stimulating hormone secretion . However, a strategy using FS344 delivered to muscle can bypass off-target effects on the hypothalamic-pituitary-gonadal axis. The transgene product is a peptide secreted from the muscle that circulates in serum, avoiding cell-surface binding sites .

Tissue Plasticity and Regenerative Research

Beyond hypertrophic responses, Follistatin-mediated myostatin inhibition may influence extracellular matrix remodeling, collagen deposition patterns, and local inflammatory mediators . Investigations suggest that modulating activin availability through Follistatin may shift the balance between regenerative and fibrotic transcriptional programs .

Regulatory and Quality Considerations

WADA Prohibited Status

Follistatin is classified under Class S4 of WADA’s Prohibited List (“Hormone and Metabolic Modulators”) as an agent preventing activin receptor IIB activation and myostatin inhibitor . This classification underscores the compound’s potency and regulatory interest in competitive sport contexts.

Black Market Quality Concerns

A study on black market FS344 products revealed significant quality issues: only nine of 17 tested products actually contained follistatin, while others contained growth-promoting peptides such as MGF or GHRP-2 . All products containing FS344 showed His-tagged FS344 and a high degree of oligomers . This highlights the importance of sourcing research-grade compounds from legitimate, licensed manufacturers.

Why Choose Liaocheng Yixin Company?

When sourcing follistatin-344 1mg for research, quality and reliability are paramount. Here’s why researchers trust us:

Manufacturer-Direct Quality

We are a legitimate, licensed peptide synthesis company with a physical headquarters in Shandong Province, China. Our facility maintains strict quality control standards, ensuring research-grade specifications.

Verified Purity Standards

Every batch undergoes rigorous testing using HPLC and mass spectrometry. Our Follistatin-344 meets ≥99% purity standards. Certificates of Analysis are available upon request.

Research-Grade Specifications

• Purity: ≥99% verified by HPLC

• Amino Acid Length: 344 amino acids

• Appearance: Lyophilized powder

• Storage: Store powder at -20°C in a sealed, desiccated container, protected from light and moisture

• Form: Lyophilized powder for research use

Quality Assurance & Testing

Every batch undergoes comprehensive quality control:

1. Synthesis by experienced biochemists

2. Purification via preparative HPLC

3. Analysis using HPLC and mass spectrometry for identity and purity verification

4. Activity testing for myostatin binding confirmation

5. Packaged under sterile conditions for research use

: What is Follistatin-344 and how does it work in research?

A: Follistatin-344 is a 344-amino-acid precursor isoform that binds and neutralizes myostatin and activins . By sequestering these TGF-β superfamily ligands, it prevents receptor engagement and modulates downstream signaling cascades that constrain muscle growth .

: What is the difference between Follistatin-344 and Follistatin-315?

A: Follistatin-344 is a precursor isoform that undergoes proteolytic processing to generate shorter, biologically active forms such as Follistatin-315 . The distinction lies in differential C-terminal processing and heparan sulfate binding affinity, influencing tissue distribution and extracellular matrix interactions . follistatin-344 1mg for research

: What research applications use Follistatin-344?

A: Follistatin-344 is used in muscle growth and neuromuscular disease research (myostatin pathway studies), endocrine and reproductive system research, and tissue plasticity and regenerative investigations.

: What is the evidence for Follistatin-344 efficacy?

A: Translational studies demonstrate increased muscle size and strength in species ranging from mice to monkeys . Research in transgenic pigs showed increased skeletal muscle proportion and reduced body fat . Preclinical data support the potential for blocking myostatin in genetic muscle disorders .

: Is this product for human use?

A: No. Our Follistatin-344 is manufactured strictly for research use only (RUO). It is not intended for human consumption or clinical applications. Follistatin is listed on the WADA Prohibited List and no approved pharmaceutical formulations are currently available .

When you need premium follistatin-344 1mg for research for your muscle biology, neuromuscular disease, or tissue plasticity studies, choose a manufacturer that prioritizes quality, transparency, and reliability. Liaocheng Yixin Company combines expert peptide synthesis capabilities with rigorous quality control to deliver research materials you can trust.   follistatin-344 1mg for research