A D-histidine has the same atoms and the same mass as L-histidine. A GHK with one D-residue is therefore indistinguishable from the correct peptide by mass alone, and on a standard reversed-phase column the two often co-elute or nearly so. A certificate reporting identity by mass and purity by HPLC has not addressed it.
Histidine is among the residues most prone to racemisation during coupling.
After hydrolysis, the amino acids are separated on a chiral stationary phase that resolves L from D, and the D-fraction of each is quantified. Alternatively, methods using chiral derivatising agents or specialised columns resolve the intact diastereomers. Both report a percentage of the wrong-handed form.
It is a specialised assay and not always on a routine certificate.
Coordination geometry depends on the three-dimensional arrangement of the donor atoms. A D-histidine presents its imidazole differently, so a diastereomer may bind copper differently or more weakly. For GHK-Cu, chiral purity bears on the chemistry, not only on nominal identity.
GHK-Cu is supplied by REVIVE LAB UAE for laboratory research use only, with identity by mass spectrometry and purity by HPLC for the batch. It is not for human or veterinary use, and no dosing, administration or protocol guidance is provided.
| Format | Strength | Price | Availability |
|---|---|---|---|
| GHK-Cu Pack | 50 mg | AED 425 | In stock |
Delivery is AED 40 flat and free on orders over AED 700. Payment is cash on delivery anywhere in the UAE, or USDT (TRC20) in advance, which takes 5% off the order total.
A D-histidine has the same atoms and the same mass as L-histidine. A GHK with one D-residue is therefore indistinguishable from the correct peptide by mass alone, and on a standard reversed-phase column the two often co-elute or nearly so. A certificate reporting identity by mass and purity by HPLC has not addressed it.
No. REVIVE LAB UAE supplies research materials and provides no dosing, administration or protocol guidance of any kind. Every product is sold for laboratory research use only and is not for human or veterinary consumption.
Stock is held in Dubai. An order confirmed before 4 PM Dubai time is dispatched the same working day, reaching Dubai and Abu Dhabi the same day and the remaining emirates within 24 hours. Delivery is AED 40 flat and free over AED 700.
Supplied for laboratory research use only. Not for human or veterinary consumption. REVIVE LAB UAE provides no dosing, administration or protocol guidance.