Sequence Database
A comprehensive reference of verified amino acid sequences for all peptides in the AMP Peptide Research Database. Includes 1-letter and 3-letter codes, sequence length, N-terminal and C-terminal modifications, disulfide bridges, and post-translational modifications. Essential for synthesis verification, sequence alignment, and structural analysis.
🔬 Sequence Notation Guide
| Notation |
Example |
Meaning |
| 1-letter code |
MEHFPGP |
Standard IUPAC single-letter amino acid codes |
| 3-letter code |
Met-Glu-His-Phe-Pro-Gly-Pro |
Standard IUPAC three-letter codes with hyphens |
| N-terminal |
H- or Ac- |
Free amine or acetylated N-terminus |
| C-terminal |
-OH or -NH₂ |
Free acid or amidated C-terminus |
| Pal- |
Palmitoyl group |
C16 fatty acid modification |
| Ac- |
Acetyl group |
N-terminal acetylation |
| Modified residues |
(D-Ala), (Hcy) |
Non-standard or D-amino acids |
| Disulfide bridge |
Cys¹–Cys⁶ |
Disulfide bond between specified cysteines |
1. Neurocognitive Peptides
Semax
| Property |
Value |
| Sequence (1-letter) |
MEHFPGP |
| Sequence (3-letter) |
Met-Glu-His-Phe-Pro-Gly-Pro |
| Length |
7 amino acids |
| N-terminus |
Free (H-Met-) |
| C-terminus |
Free acid (-Pro-OH) |
| Modifications |
None |
| Disulfide Bridges |
None |
| Molecular Formula |
C₃₇H₅₃N₉O₁₀S |
| MW (Average) |
706.83 Da |
| Class |
Synthetic ACTH(4–10) analogue |
Selank
| Property |
Value |
| Sequence (1-letter) |
TKPRPGP |
| Sequence (3-letter) |
Thr-Lys-Pro-Arg-Pro-Gly-Pro |
| Length |
7 amino acids |
| N-terminus |
Free (H-Thr-) |
| C-terminus |
Free acid (-Pro-OH) |
| Modifications |
None |
| Disulfide Bridges |
None |
| Molecular Formula |
C₃₃H₅₇N₁₁O₉ |
| MW (Average) |
756.89 Da |
| Class |
Synthetic tuftsin analogue |
Noopept
| Property |
Value |
| Chemical Name |
N-Phenylacetyl-L-Prolylglycine Ethyl Ester |
| IUPAC Name |
Ethyl 2-[(2S)-1-(2-phenylacetyl)pyrrolidine-2-amido]acetate |
| Length |
Non-peptide (dipeptide analogue) |
| N-terminus |
Phenylacetyl cap |
| C-terminus |
Ethyl ester |
| Molecular Formula |
C₁₇H₂₂N₂O₄ |
| MW (Average) |
342.39 Da |
| Class |
Cycloprolylglycine analogue |
Cerebrolysin
| Property |
Value |
| Composition |
Porcine brain-derived peptide hydrolysate |
| MW Range |
120–10,000 Da |
| Peptide Fraction |
~80% low-molecular-weight peptides, ~20% free amino acids |
| Major Peptide Motifs |
BDNF-like, GDNF-like, CNTF-like, NT-3-like, IGF-1-like fragments |
| Free Amino Acids |
Glu, Asp, Gly, Ala, Arg, Lys, Leu, Ser, Thr, Val (significant levels) |
| Sequence |
Not applicable (complex mixture of > 100 peptide species) |
| Class |
Multi-modal neurotrophic peptide cocktail |
2. Sleep & Pineal Peptides
Epitalon
| Property |
Value |
| Sequence (1-letter) |
AEDG |
| Sequence (3-letter) |
Ala-Glu-Asp-Gly |
| Length |
4 amino acids |
| N-terminus |
Free (H-Ala-) |
| C-terminus |
Free acid (-Gly-OH) |
| Modifications |
None |
| Disulfide Bridges |
None |
| Molecular Formula |
C₁₄H₂₂N₄O₉ |
| MW (Average) |
375.35 Da |
| Class |
Synthetic pineal tetrapeptide |
Pinealon
| Property |
Value |
| Sequence (1-letter) |
EDR |
| Sequence (3-letter) |
Glu-Asp-Arg |
| Length |
3 amino acids |
| N-terminus |
Free (H-Glu-) |
| C-terminus |
Free acid (-Arg-OH) |
| Modifications |
None |
| Disulfide Bridges |
None |
| Molecular Formula |
C₁₅H₂₆N₆O₈ |
| MW (Average) |
431.41 Da |
| Class |
Synthetic pineal tripeptide |
3. Growth & Signaling Peptides
Ipamorelin
| Property |
Value |
| Sequence (1-letter) |
Aib-His-(D-Nal)-Ala-Trp-(D-Phe)-Lys-NH₂ |
| Sequence (3-letter) |
Aib-His-(D-2-Nal)-Ala-Trp-(D-Phe)-Lys-NH₂ |
| Length |
5 modified residues |
| N-terminus |
Free (H-Aib-) |
| C-terminus |
Amidated (-Lys-NH₂) |
| Modifications |
Aib (α-aminoisobutyric acid), D-2-Nal (D-2-naphthylalanine), D-Phe |
| Disulfide Bridges |
None |
| Molecular Formula |
C₃₈H₄₉N₉O₅ |
| MW (Average) |
711.86 Da |
| Class |
GHSR agonist (pentapeptide) |
GHRP-2 (Pralmorelin)
| Property |
Value |
| Sequence (1-letter) |
(D-Ala)-(D-β-Nal)-Ala-Trp-(D-Phe)-Lys-NH₂ |
| Sequence (3-letter) |
D-Ala-D-β-Nal-Ala-Trp-D-Phe-Lys-NH₂ |
| Length |
6 modified residues |
| N-terminus |
Free (H-D-Ala-) |
| C-terminus |
Amidated (-Lys-NH₂) |
| Modifications |
D-Ala, D-β-Nal (D-β-naphthylalanine), D-Phe |
| Disulfide Bridges |
None |
| Molecular Formula |
C₄₅H₅₄N₁₂O₆ |
| MW (Average) |
786.93 Da |
| Class |
GHSR agonist (hexapeptide) |
GHRP-6
| Property |
Value |
| Sequence (1-letter) |
His-(D-Trp)-Ala-Trp-(D-Phe)-Lys-NH₂ |
| Sequence (3-letter) |
His-D-Trp-Ala-Trp-D-Phe-Lys-NH₂ |
| Length |
6 modified residues |
| N-terminus |
Free (H-His-) |
| C-terminus |
Amidated (-Lys-NH₂) |
| Modifications |
D-Trp, D-Phe |
| Disulfide Bridges |
None |
| Molecular Formula |
C₄₆H₅₆N₁₂O₆ |
| MW (Average) |
801.00 Da |
| Class |
GHSR agonist (hexapeptide) |
CJC-1295
| Property |
Value |
| Sequence (1-letter) |
YADAIFTNSYRKVLGQLSARKLLQDIMSRQ |
| Sequence (3-letter) |
Tyr-Ala-Asp-Ala-Ile-Phe-Thr-Asn-Ser-Tyr-Arg-Lys-Val-Leu-Gly-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Met-Ser-Arg-Gln |
| Length |
30 amino acids |
| N-terminus |
Free (H-Tyr-) |
| C-terminus |
Amidated (-Gln-NH₂) |
| Modifications |
C-terminal amidation; commonly with DAC (Drug Affinity Complex) at Lys |
| Disulfide Bridges |
None |
| Molecular Formula |
C₁₅₂H₂₅₂N₄₄O₄₂ |
| MW (Average) |
3315.74 Da |
| Class |
GHRH analogue with DAC |
Sermorelin
| Property |
Value |
| Sequence (1-letter) |
YADAIFTNSYRKVLGQLSARKLLQDIMSR-NH₂ |
| Sequence (3-letter) |
Tyr-Ala-Asp-Ala-Ile-Phe-Thr-Asn-Ser-Tyr-Arg-Lys-Val-Leu-Gly-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Met-Ser-Arg-NH₂ |
| Length |
29 amino acids |
| N-terminus |
Free (H-Tyr-) |
| C-terminus |
Amidated (-Arg-NH₂) |
| Modifications |
C-terminal amidation |
| Disulfide Bridges |
None |
| Molecular Formula |
C₁₅₃H₂₅₃N₄₅O₄₂S |
| MW (Average) |
3357.86 Da |
| Class |
GHRH fragment (1–29) |
4. GLP-1 Receptor Agonists
Tirzepatide
| Property |
Value |
| Sequence (1-letter) |
YXGEGTFTSDYSIVLDKIAQKAFVQWLIAGGPSSGAPPPS-NH₂ (X = Aib) |
| Length |
39 amino acids (modified) |
| N-terminus |
Free (H-Tyr-) |
| C-terminus |
Amidated |
| Key Modifications |
Aib at position 2; C20 diacid fatty diacid chain (γGlu-PEG₃-C20) at Lys²⁰ |
| Class |
GIP/GLP-1 dual receptor agonist |
Retatrutide
| Property |
Value |
| Sequence |
Related to tirzepatide backbone with triple receptor activity (GIP/GLP-1/glucagon) |
| Length |
39 amino acids (modified) |
| C-terminus |
Amidated |
| Key Modifications |
Fatty acid acylation at Lys residue |
| Class |
GIP/GLP-1/glucagon triple receptor agonist |
Semaglutide
| Property |
Value |
| Sequence |
Extended GLP-1 (7–37) analogue with modifications |
| Length |
31 amino acids |
| N-terminus |
Modified (protection against DPP-4) |
| C-terminus |
Free acid (-OH) |
| Key Modifications |
Aib at Aib⁸, Lys²⁶ with C18 diacid chain via γGlu spacer |
| Class |
GLP-1 receptor agonist |
5. Cosmetic & Topical Peptides
GHK-Cu (Copper Tripeptide-1)
| Property |
Value |
| Sequence (1-letter) |
GHK |
| Sequence (3-letter) |
Gly-His-Lys |
| Length |
3 amino acids |
| N-terminus |
Free (H-Gly-) |
| C-terminus |
Free acid (-Lys-OH) |
| Metal Binding |
Cu²⁺ coordinated by His imidazole and Gly/Lys amino groups |
| Class |
Copper-binding tripeptide |
Matrixyl (Palmitoyl Pentapeptide-4)
| Property |
Value |
| Sequence (1-letter) |
Pal-KTTKS |
| Sequence (3-letter) |
Pal-Lys-Thr-Thr-Lys-Ser |
| Length |
5 amino acids |
| N-terminus |
Palmitoylated (C16) |
| C-terminus |
Free acid (-Ser-OH) |
| Modifications |
N-terminal palmitoylation |
| Class |
Collagen-stimulating pentapeptide |
Argireline (Acetyl Hexapeptide-8)
| Property |
Value |
| Sequence (1-letter) |
Ac-EEMQRR-NH₂ |
| Sequence (3-letter) |
Ac-Glu-Glu-Met-Gln-Arg-Arg-NH₂ |
| Length |
6 amino acids |
| N-terminus |
Acetylated (Ac-) |
| C-terminus |
Amidated (-NH₂) |
| Class |
SNAP-25 inhibitor (wrinkle relaxant) |
SNAP-8 (Acetyl Octapeptide-3)
| Property |
Value |
| Sequence (1-letter) |
Ac-EEMQRR-NH₂ (extended variant) |
| Length |
8 amino acids |
| N-terminus |
Acetylated (Ac-) |
| C-terminus |
Amidated (-NH₂) |
| Class |
SNAP-25 inhibitor (enhanced activity) |
6. Tissue Repair & Regenerative Peptides
BPC-157 (Body Protection Compound-157)
| Property |
Value |
| Sequence (1-letter) |
GEPPPGKPADDAGLV |
| Sequence (3-letter) |
Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val |
| Length |
15 amino acids |
| N-terminus |
Free (H-Gly-) |
| C-terminus |
Free acid (-Val-OH) |
| Modifications |
None |
| Disulfide Bridges |
None |
| Partial Sequence |
Derived from human gastric juice protein BPC |
| Class |
Stable gastric pentadecapeptide |
TB-500 (Thymosin Beta-4 Synthetic Fragment)
| Property |
Value |
| Sequence (1-letter) |
SDKPDMAEIEKFDKSKLKKTETQEKNPLPSKETIEQEKQAGES |
| Length |
43 amino acids |
| N-terminus |
Free (H-Ser-) or Acetylated |
| C-terminus |
Free acid |
| Modifications |
Variable acetylation |
| Disulfide Bridges |
None |
| Class |
G-actin sequestering protein fragment |
MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA-c)
| Property |
Value |
| Sequence (1-letter) |
MRWQEMGYIFYPRKLR |
| Sequence (3-letter) |
Met-Arg-Trp-Gln-Glu-Met-Gly-Tyr-Ile-Phe-Tyr-Pro-Arg-Lys-Leu-Arg |
| Length |
16 amino acids |
| N-terminus |
Free (H-Met-) |
| C-terminus |
Free acid (-Arg-OH) |
| Class |
Mitochondrial-derived peptide |
SS-31 (Elamipretide)
| Property |
Value |
| Sequence (1-letter) |
(D-Arg)-(2',6'-Dmt)-Lys-Phe-NH₂ |
| Sequence (3-letter) |
D-Arg-2',6'-dimethyltyrosine-Lys-Phe-NH₂ |
| Length |
4 modified amino acids |
| N-terminus |
Free (H-D-Arg-) |
| C-terminus |
Amidated (-NH₂) |
| Modifications |
D-Arg, 2',6'-dimethyltyrosine (Dmt) |
| Class |
Mitochondrial-targeted cardiolipin stabilizer |
Humanin
| Property |
Value |
| Sequence (1-letter) |
MAPRGFSCLLLLTSEIDLPVKRRA |
| Sequence (3-letter) |
Met-Ala-Pro-Arg-Gly-Phe-Ser-Cys-Leu-Leu-Leu-Leu-Thr-Ser-Glu-Ile-Asp-Leu-Pro-Val-Lys-Arg-Arg-Ala |
| Length |
24 amino acids |
| N-terminus |
Free (H-Met-) |
| C-terminus |
Free acid (-Ala-OH) |
| Disulfide Bridges |
Cys⁸ involved in potential dimerization |
| Class |
Mitochondrial-derived cytoprotective peptide |
AOD-9604
| Property |
Value |
| Sequence (1-letter) |
LRRIRHMAEHERRL |
| Sequence (3-letter) |
Leu-Arg-Arg-Ile-Arg-His-Met-Ala-Glu-His-Glu-Arg-Arg-Leu |
| Length |
15 amino acids |
| N-terminus |
Free (H-Leu-) |
| C-terminus |
Free acid (-Leu-OH) |
| Modifications |
Derived from hGH 177–191 fragment |
| Class |
Human growth hormone fragment (lipolytic) |
📊 Sequence Length Summary
| Peptide |
Length |
1-Letter Sequence |
Category |
| Pinealon |
3 |
EDR |
Sleep |
| Epitalon |
4 |
AEDG |
Sleep |
| GHK-Cu |
3 |
GHK |
Cosmetic |
| SS-31 |
4 (modified) |
(D-Arg)-Dmt-Lys-Phe-NH₂ |
Mito |
| Matrixyl |
5 |
Pal-KTTKS |
Cosmetic |
| Argireline |
6 |
Ac-EEMQRR-NH₂ |
Cosmetic |
| GHRP-2 |
6 (modified) |
(D-Ala)-(D-β-Nal)-Ala-Trp-(D-Phe)-Lys-NH₂ |
Growth |
| GHRP-6 |
6 (modified) |
His-(D-Trp)-Ala-Trp-(D-Phe)-Lys-NH₂ |
Growth |
| Semax |
7 |
MEHFPGP |
Neuro |
| Selank |
7 |
TKPRPGP |
Neuro |
| SNAP-8 |
8 (modified) |
Ac-EEMQRR (extended) -NH₂ |
Cosmetic |
| BPC-157 |
15 |
GEPPPGKPADDAGLV |
Tissue Repair |
| AOD-9604 |
15 |
LRRIRHMAEHERRL |
Mito |
| MOTS-c |
16 |
MRWQEMGYIFYPRKLR |
Mito |
| Humanin |
24 |
MAPRGFSCLLLLTSEIDLPVKRRA |
Mito |
| Sermorelin |
29 |
YADAIFTNSYRKVLGQLSARKLLQDIMSR-NH₂ |
Growth |
| CJC-1295 |
30 |
YADAIFTNSYRKVLGQLSARKLLQDIMSRQ |
Growth |
| Semaglutide |
31 (modified) |
Extended GLP-1 analogue |
GLP-1 |
| Tirzepatide |
39 (modified) |
YXGEGTFTSDYSIVLDKIAQKAFVQWLIAGGPSSGAPPPS-NH₂ |
GLP-1 |
| TB-500 |
43 |
SDKPDMAEIEKFDKSKLKKTETQEKNPLPSKETIEQEKQAGES |
Tissue Repair |
🔗 AMP Peptide Product Link
Browse peptide sequences at AMP Peptide