Peptide Science research editorial team.
Follistatin 315 1mg Overview
Follistatin 315 1mg from Peptide Science is the synthetic 315-residue alternative splice isoform of human follistatin, supplied as a lyophilised vial for in-vitro myostatin-pathway and preclinical muscle-research applications. Follistatin 315 is the cell-surface-associated isoform, distinct from the secreted longer Follistatin 344 form.
Compound Class and Mechanism
Follistatin 315 (FST-315) is the shorter alternative splice isoform of human follistatin, distinguished from the 344-residue secreted form by the absence of the acidic C-terminal tail. The 315-residue form is associated with cell-surface heparan sulfate proteoglycans, giving it tissue-localised activity profile distinct from the freely-circulating FST-344. Both isoforms retain the activin- and myostatin-binding activity that defines the follistatin family, with the localisation difference providing complementary research tools for studying myostatin-pathway compartmentalisation. Browse the broader IGF and muscle-growth peptide range.
Specifications
| Property | Value |
|---|---|
| Compound | Follistatin 315 (FST-315, 315-residue alternative splice isoform of human follistatin) |
| Class | Myostatin-binding glycoprotein; cell-surface-associated follistatin isoform |
| Amino-acid count | 315 |
| Molecular weight | approximately 34670 g/mol |
| Supplied form | Lyophilised powder, sealed vial |
| Strength | 1 mg per vial |
| Purity | greater than 99 percent (HPLC verified) |
| Storage | 2 to 8 degrees Celsius lyophilised; minus 20 degrees Celsius long-term |
For the secreted 344-residue isoform, see Follistatin 344 1mg.
Reconstitution and Handling
The lyophilised vial reconstitutes with bacteriostatic water at the working concentration set by the principal investigator. Aliquoting reconstituted stock for single-use frozen storage is the standard preclinical handling practice cited in peptide-research literature.
Quality and Shipping
Each batch passes HPLC at greater than 99 percent purity, with mass-spectrometry identity confirmation. A Certificate of Analysis accompanies every order. Material is filled in a US laboratory under ISO 9001:2015-aligned quality systems and dispatched in temperature-monitored insulated packaging via overnight or two-day courier.
For laboratory research and development use only. Not for human or veterinary consumption. Has not been evaluated by the U.S. Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease. Purchasers acknowledge they are qualified researchers age 21 or older and accept responsibility for compliance with all applicable federal, state, and local laws.
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