Ask a biomedical scientist
✕
Get specialist, research-focused guidance. We’ll reply by email. (For research use only.)
P21 5mg
£44.00
In stock
IN STOCK — ships Monday
P21 5mg is a synthetic research peptide (≥99% purity, HPLC-verified) studied for its potential neuroprotective and cognitive-enhancing effects. Supplied as a stable lyophilised powder with full COA for laboratory use only.
Free UK Delivery over £100
Certificate of Analysis (COA)
HPLC Tested
99% Purity
Shipping to United Kingdom (UK): Royal Mail Tracked 24, Royal Mail Guaranteed by 1pm
Add Bacteriostatic Water (Recommended)
Estimated concentration: —
In stock
Research Description
P21 5mg
≥99% Purity • HPLC Verified • Manufactured for Scientific Excellence
Overview
Peptiology’s P21 (5 mg) is a premium-grade research peptide specifically developed for advanced scientific studies in neurobiology, synaptic plasticity, and neuroprotection. Derived from a fragment of the cerebrolysin protein complex, P21 is of particular interest for its potential role in enhancing neuronal growth and cognitive function in experimental models. Its exceptional purity and stability make it ideal for researchers who require precision, consistency, and reproducibility.
Product Specifications
Product Name: P21 5 mg
Catalogue Number: P21-005
Molecular Formula: C₆₃H₉₃N₁₇O₁₁
Molecular Weight: 1290.52 g/mol
Purity: ≥99% (HPLC-Verified)
Sequence: Ala-Gly-Glu-Ser-Pro-Gly-Gly-Gly-Pro-Gly-Pro
Form: Lyophilised Solid
Storage & Handling
P21 is supplied as a lyophilised powder to maintain stability and integrity during transport and storage. Store in a cool, dry environment, away from direct light. For reconstitution, use only bacteriostatic water or equivalent laboratory-grade solvent.
Synthesis & Quality Assurance
Our P21 is synthesised under stringent laboratory controls, ensuring:
Exceptional purity and sequence integrity
Consistent batch-to-batch performance
Compliance with international research-grade standards
Each batch undergoes independent third-party HPLC analysis, with a Certificate of Analysis (COA) available for complete transparency.
Why Choose Peptiology?
We are committed to providing high-purity peptides designed exclusively for scientific research, backed by:
Direct manufacturer partnerships for full supply chain transparency
No intermediaries — direct from synthesis to your lab
Independent verification for every batch
Fast UK dispatch and responsive researcher support
Peptiology is trusted by universities, laboratories, and research professionals worldwide — delivering the purity, reliability, and scientific confidence your research demands.
⚠️ Important Notice
This product is intended strictly for laboratory research and in vitro use only. It is not for human consumption, medical, or veterinary application. No instructions for dosing or clinical use will be provided.
Reconstitution & Handling
- Recommended solvent Refer to COA / product notes
- Storage Store as directed in documentation
Important reconstitution notice:
Unless the product page, COA, or batch-specific documentation states otherwise, Peptiology peptide products should only be reconstituted using bacteriostatic water supplied by Peptiology.
Peptides are chemically sensitive materials, and reconstitution behaviour can be influenced by the exact diluent used. Different diluents may vary in pH, ionic strength, preservative content, buffering capacity, osmolarity, dissolved gases, and trace impurities. Even small differences in these factors can affect how a peptide dissolves and behaves in solution.
From a chemistry perspective, pH is especially important because it can alter the ionisation state of acidic and basic amino acid side chains. This can change the peptide’s net charge, hydrogen bonding, electrostatic interactions, and hydrophobic association. If the local pH environment is unsuitable, the peptide may show cloudiness, floating particles, clumping, gel-like behaviour, aggregation, or precipitation.
Bacteriostatic water, sterile water, saline, acetic acid water, and buffered solvent systems are not chemically identical. Substituting one for another may change the peptide’s solubility profile, particularly for longer sequences, hydrophobic peptides, modified peptides, or peptides with specific salt forms.
For consistency, reproducibility, and batch comparability, only the recommended diluent system should be used unless an alternative solvent is specifically stated in the product documentation.
Peptides are chemically sensitive materials, and reconstitution behaviour can be influenced by the exact diluent used. Different diluents may vary in pH, ionic strength, preservative content, buffering capacity, osmolarity, dissolved gases, and trace impurities. Even small differences in these factors can affect how a peptide dissolves and behaves in solution.
From a chemistry perspective, pH is especially important because it can alter the ionisation state of acidic and basic amino acid side chains. This can change the peptide’s net charge, hydrogen bonding, electrostatic interactions, and hydrophobic association. If the local pH environment is unsuitable, the peptide may show cloudiness, floating particles, clumping, gel-like behaviour, aggregation, or precipitation.
Bacteriostatic water, sterile water, saline, acetic acid water, and buffered solvent systems are not chemically identical. Substituting one for another may change the peptide’s solubility profile, particularly for longer sequences, hydrophobic peptides, modified peptides, or peptides with specific salt forms.
For consistency, reproducibility, and batch comparability, only the recommended diluent system should be used unless an alternative solvent is specifically stated in the product documentation.
- Do not substitute diluents unless specifically instructed.
- Only use Peptiology-supplied bacteriostatic water unless stated otherwise.
- Do not assume all peptides behave the same after reconstitution.
- Visible changes may be caused by diluent incompatibility, pH shift, ionic effects, concentration effects, or peptide-specific solubility behaviour.
- Peptiology cannot verify reconstitution compatibility where non-Peptiology diluents have been used.
For laboratory research use only. Not for human or veterinary use.
Documentation
Batch verification
Live Certificate of Analysis
View the live batch-specific certificate, including purity, batch number, test date, reviewer details, and QR verification.
Reviews (6)
6 reviews for P21 5mg
Only logged in customers who have purchased this product may leave a review.
Sarah Mitchell (verified owner) –
very pleased with the secure packaging, readable label, and responsive customer support. The vial was easy to inspect on arrival.
Noura Alqahtani (verified owner) –
customer service answered my delivery question promptly, and the product arrived in excellent condition. The seal was intact.
Chloé Bernard (verified owner) –
the product matched the listing, arrived promptly, and was convenient to prepare for daily use. The label information was easy to follow.
Jonas Wagner (verified owner) –
the vial was well sealed, neatly labelled, and easy to work with during routine laboratory preparation. The compact format stored neatly.
Mariam Noor (verified owner) –
professional service from order confirmation through delivery, with a clean and well-presented vial. The packaging prevented movement in transit.
Michael Turner (verified owner) –
the vial arrived securely packed, the label was clear, and the material reconstituted smoothly for laboratory handling. The presentation was consistent.