01 / Naming
Two spellings, one sequence.
Epithalon and Epitalon are two spellings of one name. PubChem lists both, with Epithalone, as synonyms of a single record (CID 219042), and the cited Cayman record uses Epitalon. Each names the same four-residue chain, Ala–Glu–Asp–Gly, abbreviated AEDG.
| Names in public records | Epithalon, Epitalon, Epithalone |
|---|---|
| Sequence | Ala–Glu–Asp–Gly (AEDG) |
| Length | 4 residues |
| Formula, free peptide | C14H22N4O9 |
| Molecular weight, free peptide | 390.35 g/mol |
| PubChem CID | 219042 |
02 / Molecular architecture
A closer look at the chain.
The sequence Ala–Glu–Asp–Gly is abbreviated AEDG. Two adjacent acidic amino acids make this short sequence easy to distinguish from other small peptides with similar commercial names.
- 4 amino acids
- AEDG
- Two adjacent acidic residues
- 1Ala
- 2Glu
- 3Asp
- 4Gly
Reference information: [1][2]. Actual lot identity must be verified separately.
Reading AEDG from left to right.
AEDG uses the one-letter amino-acid codes for alanine, glutamate, aspartate and glycine. Sequence notation is read from the N-terminus toward the C-terminus. The order matters: a peptide containing those same four residues in another order would have a different backbone identity.
Two adjacent acidic side chains.
Glutamate and aspartate sit next to each other in this reference sequence. Their side chains contain carboxyl groups, while alanine and glycine provide different side-chain structures. This is a chemical description of the backbone’s building blocks; it does not specify the pH of a solution or the counterion in a supplied powder.
Structure and research references: [1]
03 / Read the evidence
Research & analytical context.
The chemical reference lists the AEDG sequence and separately identifies its salt form. The peptide backbone and the counterion are different parts of the specification; a sequence drawing does not identify which salt a particular lot contains.
The distinction that matters
Epithalon and Pinealon have different residue sequences despite their similar names. Use the complete identity record when comparing molecular mass or analytical results.
04 / From reference to record
Know the lot, too.
A publication describes its own test material. Your lot’s certificate describes what was tested on that lot. Keep the compound name, batch number and reported methods together when reviewing a result.
Identity & composition
Check sequence or chemical form, terminal modifications, counterion and—where relevant—each blend component.
Analytical results
Read purity, content, sterility and endotoxin results as separate measurements. Only call a test passed when the actual report supports it.
Handling & storage notes
Lyophilized material: Store at −20°C; protect from light and moisture.
Follow the material-specific label and supporting storage documentation. These temperatures do not establish a shelf life.
How to store lyophilized peptides05 / Reference questions
A few details, explained.
Are Epithalon and Epitalon different sequences?
Those spellings are used for the AEDG reference. Comparing the sequence is more informative than comparing spelling alone. The chemical form and terminal groups should still be checked separately.
How is it different from Pinealon?
Epithalon is the four-residue AEDG sequence. Pinealon is the three-residue EDR sequence. Similar names and some shared residue types do not make the chains identical.
Read alongside the references: [1]
06 / Continue reading
Go to the source.
Each source is labeled by its type. External sources are not Pioneer batch certificates.