P21 10mg | 10-Vial Kit | Cell Cycle Regulatory Protein

QSC P21 (CNTF-derived neuroprotective peptide) — ≥99% HPLC purity, MS confirmed, Janoshik COA. Research use only.

✓ 99%+ Purity ✓ COA Available
✓ Free Shipping on All Orders ✓ Domestic Warehouses (USA/EU/UK/AU/CA)

$210

or
SKU: QSC-P21-10MG-10VIAL
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QSC RESEARCH GRADE

≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House SPPS5-Region Domestic Shipping

What is P21?

P21 (CNTF-derived neuroprotective tetrapeptide) is a 4-amino acid CNTF-derived peptide. Synthetic tetrapeptide derived from ciliary neurotrophic factor (CNTF) activating CNTF receptor (CNTFRα) complex and downstream JAK-STAT3 signalling. Promotes neuronal survival, reduces neuroinflammation, and supports neural progenitor cell activity in CNS injury and neurodegeneration models.

Research Applications

CNTF Receptor Activation

CNTFRα complex binding and JAK-STAT3 pathway research

Neuronal Survival

Anti-apoptotic neuroprotection in ischemia and excitotoxicity models

Neural Progenitor Biology

Proliferation and differentiation of neural progenitor cells

Neuroinflammation

Microglia and astrocyte modulation, inflammatory cytokine reduction

vs Full CNTF

Minimal active fragment potency and CNS penetration comparison

Quick Specs

Form Lyophilized powder
Purity ≥99% by HPLC — every batch
CAS Number 9001-37-0 (for recombinant forms; sequence-dependent)
Molecular Formula Sequence-specific (human p21 protein ~164 amino acids)
Peptide Type Cyclin-Dependent Kinase Inhibitor (CDKI) / Cell Cycle Regulatory Protein
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)

🧪 Peptide Research Tools: Use QSC’s free peptide calculators — reconstitution, BAC water, dosing, half-life, and mixing charts.
🌍 Domestic shipping: 🇺🇸 USA  ·  🇪🇺 EU  ·  🇬🇧 UK  ·  🇨🇦 Canada  ·  🇦🇺 Australia
🧬 PubMed Research — 10mg
Search PubMed ↗

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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