AHK-Cu Copper Peptide: A Laboratory Research Reference

AHK-Cu is a copper-binding tripeptide complex of alanine, histidine, and lysine. It is studied in laboratory research as a structural analogue of the copper peptide GHK-Cu, investigated for copper-dependent skin and hair-follicle signalling in experimental models.

This page is a non-promotional scientific reference for researchers. It summarises the chemical identity, molecular characteristics, mechanism as described in the literature, research areas, and analytical testing of AHK-Cu. It does not provide dosing, therapeutic, or human-use guidance of any kind. AHK-Cu supplied by Bulk Aussie Peptides is for laboratory research purposes only.

What Is AHK-Cu?

AHK-Cu is a copper(II) complex of the tripeptide L-alanyl-L-histidyl-L-lysine (alanine–histidine–lysine, single-letter A-H-K). It is the alanine-substituted analogue of the well-characterised copper peptide GHK-Cu (glycyl-L-histidyl-L-lysine), differing by a single amino-terminal residue. This substitution changes the molecular mass and is the basis for distinguishing the two copper peptides analytically.

For background on how copper peptides are produced and verified, see the synthetic peptides research guide and the GHK-Cu reference.

Molecular Characteristics

• Classification: a copper(II) coordination complex of a short alanine-containing tripeptide.
• Sequence (metal-free): L-alanyl-L-histidyl-L-lysine (AHK).
• Relationship to GHK-Cu: differs from GHK-Cu by a single amino-terminal residue (alanine versus glycine), producing a distinct molecular mass.
• Physical form: supplied as a lyophilised (freeze-dried) powder, the standard presentation for research material.

How AHK-Cu Works

Like GHK-Cu, AHK-Cu delivers a chelated copper ion, which functions as a cofactor in the metalloenzymes involved in connective-tissue remodelling and wound-healing pathways. In laboratory models, copper peptides are studied for effects on extracellular-matrix synthesis, cell migration, and hair-follicle activity. The substitution of alanine for glycine is used to probe how the amino-terminal residue influences copper binding and biological activity.

These observations are preliminary and preclinical; they do not constitute a therapeutic use.

Areas of Scientific Research

• Copper-peptide chemistry: characterisation of copper coordination and binding stoichiometry.
• Tissue remodelling: studies of copper-dependent connective-tissue and wound-healing signalling.
• Analogue comparison: comparison of AHK-Cu with GHK-Cu and other copper peptides.

These investigations are conducted in vitro or in approved animal research models under institutional oversight. They do not translate to approved human use.

Analytical Testing

• HPLC for purity assessment.
• Mass spectrometry for identity confirmation, distinguishing AHK-Cu from GHK-Cu by their different molecular masses.

Guidance on reading the resulting documents is available in the article on how to read a peptide Certificate of Analysis.

Storage and Handling

In a laboratory context, lyophilised AHK-Cu is typically stored in a freezer, protected from light and moisture, and handled according to the product-specific documentation. General guidance is covered in the peptide storage and stability reference.

Frequently Asked Questions

• What is AHK-Cu? AHK-Cu is a copper complex of the tripeptide alanine–histidine–lysine.
• How does AHK-Cu differ from GHK-Cu? It substitutes alanine for glycine at the amino terminus, changing the molecular mass.
• Why is copper important? Copper acts as a cofactor for metalloenzymes involved in tissue remodelling.
• What is AHK-Cu studied for? It is investigated in laboratory models for copper-dependent skin and hair-follicle signalling.
• How is AHK-Cu purity tested? By HPLC, with identity confirmed by mass spectrometry.

References

• Pickart, L., Vasquez-Soltero, J. M., & Margolina, A. (2015). GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration. BioMed Research International, 2015, 648108. PubMed 26167488. This reference describes the closely related GHK-Cu scaffold on which AHK-Cu is based.

Related Research Resources

• GHK-Cu Copper Peptide: A Research Reference — the related glycine-based copper peptide.
• GHK-Cu vs AHK-Cu: A Research Comparison — how the two copper peptides are distinguished.