Follistatin-344 1mg | 20-Vial Kit | FST-344 | Myostatin & Activin Inhibitor Research
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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.
$1,150.00
* The information on this page is a summary and is not intended to cover all available information about this medication. It does not cover all possible uses, directions, precautions, drug interactions or adverse effects and is not a substitute for the expertise and judgement of your healthcare professional.
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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)
Frequently Asked Questions
Frequently asked questions
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Websites in professional use templating systems. Commercial publishing platforms and content management systems ensure that you can show different text, different data using the same template. When it’s about controlling hundreds of articles, product pages for web shops.
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