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For research purposes only — not for human consumption. For laboratory and educational reference.
Growth

Follistatin (FST-344)

Follistatin (FST-344) is a recombinant glycoprotein derived from the naturally occurring follistatin family, recognized for its high-affinity binding interactions with activin and myostatin proteins. It has been studied extensively in growth and tissue research for its relationship to muscle signaling pathways, cellular differentiation, and regulatory feedback within the TGF-beta superfamily.

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80449-31-6
CAS
~36 kDa g/mol
Molecular weight
3mL
Vial

What is Follistatin (FST-344)?

Growth · 1mg · 3mL

Follistatin (FST-344) is a recombinant glycoprotein derived from the naturally occurring follistatin family, recognized for its high-affinity binding interactions with activin and myostatin proteins. It has been studied extensively in growth and tissue research for its relationship to muscle signaling pathways, cellular differentiation, and regulatory feedback within the TGF-beta superfamily. Its large multidomain protein structure distinguishes it from shorter peptide analogues and places it within a more complex category of biologic signaling compounds. Lyophilized powder, 3mL vial. Sold at 1mg per vial. For research use only.

Standard Follistatin-344 (FST-344) glycoprotein. Native sequence, ~1-2 hour half-life. Myostatin inhibitor and activin antagonist. DIFFERENT from FLGR242 (which is a modified construct with albumin-binding linker for extended half-life). Sourceable from multiple suppliers.

Compound Information

Technical specifications

Molecular Profile

What Is Follistatin (FST-344)?

Type Peptide
CAS Number 80449-31-6
Molecular Weight ~36 kDa g/mol
Formula C1555H2462N428O470S37
Storage Requirements

Stability Information

  • Lyophilized
  • Protect from light
  • For research use only
  • Lyophilized
    -20°C 24 months (unopened)
  • Reconstituted
    2–8°C Up to 30 days
  • Working solution
    2–8°C Use within 7 days

Product specifications

Technical details

Technical specifications
CAS number
80449-31-6
Molecular formula
C1555H2462N428O470S37
Molecular weight
~36 kDa g/mol g/mol
Type
Peptide
Vial size
3mL
Molecular weight
~36 kDa g/mol — Registry verified

Storage & Handling

Storage conditions for unopened vials

LYOPHILIZED
-20°C

Long-term storage. Protect from moisture and light.

RECONSTITUTED
2–8°C

Refrigerate after reconstitution. Do not freeze reconstituted solution unless validated for your protocol.

SHIPPING
Ambient

Lyophilized peptides ship at ambient temperature under normal conditions.

WARNINGS
  • For research use only — not for human or veterinary consumption.
  • Handle with appropriate PPE in a controlled laboratory environment.
  • Confirm form, salt, and concentration against your supplier CoA before use.

Sources & References

Peer-reviewed research

Reference UniProt P19883 · multiple suppliers

Follistatin (FST-344) is a recombinant glycoprotein derived from the naturally occurring follistatin family, recognized for its high-affinity binding interactions with activin and myostatin proteins. It has been studied extensively in growth and tissue research for its relationship to muscle signaling pathways, cellular differentiation, and regulatory feedback within the TGF-beta superfamily. Its large multidomain protein structure distinguishes it from shorter peptide analogues and places it within a more complex category of biologic signaling compounds. Lyophilized powder, 3mL vial. Sold at 1mg per vial. For research use only.

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