--- title: "What is the amino acid sequence of Epitalon? | Sable Peptides" description: "Epitalon is a research peptide whose amino acid sequence is on the public registry record. The published sequence is Ala-Glu-Asp-Gly." canonical: https://www.sablepeptides.co.uk/questions/epitalon-sequence publisher: Sable Peptides Limited (UK company 17488610) note: Research use only. Not for human or veterinary use. --- # What is the amino acid sequence of Epitalon? Epitalon is a research peptide whose amino acid sequence is on the public registry record. The published sequence is Ala-Glu-Asp-Gly. Its molecular formula is C14H22N4O9. Its molecular weight is 390.35 g/mol. The CAS Registry Number is 307297-39-8. PubChem CID 219042 indexes the structure. Sequence. Ala-Glu-Asp-Gly Class. peptide. Formula. C14H22N4O9. Mass. 390.35 g/mol. Analytical note. Identity confirmation by mass spectrometry uses the mass calculated from the formula. Sable's release specification is ≥99% by HPLC with identity confirmed against the expected mass (quality page). Research use only. Not a medicine. Not for human or veterinary use. ## Sources - [https://pubchem.ncbi.nlm.nih.gov/compound/219042](https://pubchem.ncbi.nlm.nih.gov/compound/219042) ## Epitalon: reference facts 8 Epitalon values, each linked to its public source; see the [Epitalon reference page](/ref/epitalon). | Synonyms | Epithalon; AEDG peptide; tetrapeptide Ala-Glu-Asp-Gly (pubchem.ncbi.nlm.nih.gov) | | --- | --- | | Compound class | peptide (pubchem.ncbi.nlm.nih.gov) | | CAS Registry Number | 307297-39-8 (pubchem.ncbi.nlm.nih.gov) | | Sequence | Ala-Glu-Asp-Gly (pubchem.ncbi.nlm.nih.gov) | | Molecular formula | C14H22N4O9 (pubchem.ncbi.nlm.nih.gov) | | Molecular weight | 390.35 g/mol (pubchem.ncbi.nlm.nih.gov) | | PubChem CID | 219042 (pubchem.ncbi.nlm.nih.gov) | | Storage (lyophilised) | -20 °C, dry, protected from light (sigmaaldrich.com) | ## Calculated sequence properties Computed from the listed sequence. See the [methodology](/data/methodology). | Length | 4 residues | | --- | --- | | Theoretical pI | 3.55 (calculated from sequence) | | Net charge at pH 7 | -2.02 (calculated) | ## Sizes and prices at Sable | Vial | Price | Per mg | UK same-size check (2026-10-16) | | --- | --- | --- | --- | | 5 mg | £12.93 | £2.59 | no same-size match | | 10 mg | £13.93 | £1.39 | lowest other £13.95 across 13 UK sellers | | 50 mg | £24.98 | £0.50 | lowest other £25.00 across 6 UK sellers | Multi-vial pricing on the same item: 3+ vials 10% off, 5+ vials 15% off, 10+ vials 20% off. Every lot has a certificate of analysis: [CoA library](/coa). ## Typical analytical method | HPLC column | C18 reversed-phase (100-120 A pore) | | --- | --- | | Mobile phase | A: water + 0.1% TFA; B: acetonitrile + 0.1% TFA; linear gradient (e.g. 5-65% B over 20-30 min) | | Detection | 214-220 nm (peptide bond) | General literature method. The lot CoA records the method actually used. [How to read an HPLC chromatogram](/learn/how-to-read-an-hplc-chromatogram). ## Related questions - [What does Epitalon dissolve in?](/questions/epitalon-solubility) - [How stable is lyophilised Epitalon?](/questions/epitalon-stability-lyophilised) - [What is the difference between Epitalon and N-Acetyl Epitalon?](/questions/epitalon-vs-n-acetyl-epitalon) ## Lyophilised storage on file From the Sable storage reference (lyophilised material only; temperature, light, moisture). Literature basis is linked per row. See [peptide storage](/learn/peptide-storage-and-solubility). | Compound | Lyophilised storage | Light / notes | | --- | --- | --- | | Epitalon | -20 C long term (-80 C acceptable), sealed and desiccated; 2-8 C for weeks | protect from light; Asp-Pro/Asp-Gly motif: hydrolysis/isomerisation risk in solution (source) | | Epitalon sodium | -20 C long term (-80 C acceptable), sealed and desiccated; 2-8 C for weeks | protect from light; no specific sequence liabilities identified from sequence data on file (source) | ## Typical analytical method: Epitalon Reference HPLC and MS conditions from the Sable analytical-methods file; a lot's CoA states the method actually used. See [how to read a CoA](/guides/how-to-read-a-coa). | Compound | HPLC column / detection | MS / expected ion | | --- | --- | --- | | Epitalon | C18 reversed-phase (100-120 A pore); 214-220 nm (peptide bond) | ESI-MS (positive mode); LC-MS for identity; [M+1H]1+ ~391.4; [M+2H]2+ ~196.2; [M+3H]3+ ~131.1 | Research use only. Not a medicine. Not for human or veterinary use.