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How to Read GEPPPGKPADDAGLV: A Beginner Guide to One-Letter Amino Acid Codes
Scientific papers write peptide sequences as letters, one per amino acid. Once you know the key, a string like GEPPPGKPADDAGLV becomes readable.
The key letters you will see most
| Letter | Amino acid | Letter | Amino acid |
|---|---|---|---|
| A | Alanine | M | Methionine |
| D | Aspartic acid | P | Proline |
| E | Glutamic acid | R | Arginine |
| F | Phenylalanine | S | Serine |
| G | Glycine | V | Valine |
| H | Histidine | W | Tryptophan |
| K | Lysine | Y | Tyrosine |
| L | Leucine |
Decoding the catalog
- BPC-157: GEPPPGKPADDAGLV (15 letters, 15 residues)
- KPV: KPV
- GHK: GHK
- DSIP: WAGGDASGE
- Semax: MEHFPGP
Reading direction
Always left to right: N-terminus first, C-terminus last. See the full sequence on the Nasal BPC-157 10mg listing. Keep reading to learn what the letters do.
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For laboratory research use only. Not for human or veterinary use, and not intended to diagnose, treat, cure or prevent any condition. This article is educational and is not medical advice.
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