Follistatin 1mg | 20-Vial Kit | FST-344 | Myostatin & Activin Inhibitor Research

Follistatin 1mg | 20-Vial Kit — Activin and myostatin binding glycoprotein (FST-344) — sequesters TGF-β superfamily ligands including myostatin (GDF-8) and activins to suppress receptor signalling, studied for muscle hypertrophy models. ≥99% HPLC purity, MS confirmed, Janoshik COA. Research use only.

✓ 99%+ Purity ✓ COA Available
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$670

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SKU: QSC-FO-FOLLISTATIN-1MG-20VIAL
Categories: , , , , , , , , , ,
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QSC RESEARCH GRADE

≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House SPPS8-Region Domestic Shipping

What is Follistatin??

Follistatin (FST-344, CAS 122956-17-2) is a single-chain glycoprotein (MW ~35 kDa for FST-344 isoform) belonging to the TGF-β superfamily binding protein class. It acts as a potent endogenous inhibitor of activins, myostatin (GDF-8), GDF-11, GDF-9, and BMPs by binding these ligands with high affinity and sequestering them from their receptors. FST-344 is the circulating, proteoglycan-binding–deficient isoform with broader systemic distribution than FST-288. It is a key research tool for studying muscle hypertrophy, fertility (FSH/activin axis), bone formation, and TGF-β pathway biology.

Research Applications

Myostatin Inhibition

GDF-8 sequestration, muscle fibre hypertrophy, atrophy model reversal — compared to ACE-031 and MSTN antibodies

Activin/FSH Axis

Activin A/B neutralisation, FSH suppression in pituitary research, ovarian folliculogenesis

Bone Formation

BMP-2/4/7 modulation, osteoblast differentiation, bone mineral density studies

Reproductive Biology

Gonadal steroidogenesis, spermatogenesis, granulosa cell function, follicle dynamics

TGF-β Superfamily Profiling

Broad ligand-trap characterisation across activin, GDF, and BMP family members

Quick Specs

Form Lyophilized powder
Purity ≥99% by HPLC — every batch
CAS Number 122956-17-2
Isoform FST-344 (systemic, heparin-low-affinity isoform)
Molecular Weight ~35 kDa (glycosylated)
Peptide Type Recombinant glycoprotein / TGF-β superfamily ligand trap
Identity MS molecular weight confirmed — every batch
COA Janoshik-independent, publicly verifiable
Manufacture In-house Fmoc SPPS — Qingdao, China
Storage -20°C sealed | 2–8°C reconstituted (2–4 weeks)
Shelf Life 24 months unopened

Certificate of Analysis (COA)

For the latest Certificate of Analysis (COA), please email us with your request.

Frequently Asked Questions

How do I reconstitute this peptide?
Add 1–2mL bacteriostatic water to the lyophilized vial by directing water down the inner wall of the vial. Swirl gently until the powder fully dissolves — do not shake or vortex. The solution should be clear and colourless. Use immediately or refrigerate at 2–8°C.
How should this peptide be stored?
Store lyophilized peptide vials at −20°C for long-term storage. Once reconstituted, store at 2–8°C (refrigerator) and use within 21–28 days. Avoid repeated freeze-thaw cycles, direct light, and heat exposure.
What purity is this QSC compound and how is it verified?
All QSC compounds are tested to ≥99% purity by HPLC peak area analysis on every production batch. Molecular identity is confirmed by mass spectrometry. A Certificate of Analysis (COA) is published on the product page and independently verifiable at verify.janoshik.com using the batch reference number.
🧪 Peptide Research Tools: Use QSC’s free peptide calculators — reconstitution, BAC water, dosing, half-life, and mixing charts.
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Source: PubMed / NCBI  ·  Last 10 years  ·  Refreshed every 24 hours  ·  For research reference only — not clinical guidance.

⚠️ RESEARCH USE ONLY — NOT FOR HUMAN CONSUMPTION

QSC products are strictly for in vitro and in vivo laboratory research. Not intended for diagnostic, therapeutic, or personal use.

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Research Use Disclaimer

All QSC products are strictly for laboratory, scientific, and research use only. They are not for human consumption, medical treatment, diagnosis, or disease prevention.

By purchasing or using QSC products, you confirm:

  • You are a qualified researcher or acting under the supervision of one.
  • Products will only be used for legitimate research purposes.
  • Products are not evaluated by the FDA or any regulatory authority for human use.
  • You assume all responsibility for legal compliance, proper handling, and storage.
  • You meet the legal age requirement in your jurisdiction.
No Warranty: Products are sold “as is,” with no express or implied warranties regarding efficacy, safety, or suitability. Results in research may vary. QSC is not responsible for outcomes, interpretations, or conclusions drawn from any studies conducted using these products.
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General Safety & Handling

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Not for Human Use

These compounds are for research only. Any off-label, personal, or clinical use is strictly outside the intended scope of supply.

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PPE Required

Always use appropriate personal protective equipment (gloves, lab coat, eye protection) when handling peptides.

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Storage Compliance

Follow product-specific storage conditions to maintain identity, purity, and biological activity.

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Proper Disposal

Dispose of all materials in accordance with institutional biosafety, chemical waste, and hazardous material protocols.

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Verify Quality

Janoshik COAs are available on every product page. Verify batch identity (MS confirmed) and purity (≥99% HPLC) before use.

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Peptide Storage Guidelines

🌑 Light-protected💧 Low moisture🌡️ Stable temperature🔬 Sterile handling

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