GHK-Cu 15mg — Vial Spec, Reconstitution Math & COA
A 15mg vial of GHK-Cu (Glycyl-L-Histididyl-L-Lysine Copper Complex) contains high-purity lyophilized copper tripeptide designated strictly for laboratory research. This standardized mass allows investigators to prepare controlled working solutions for evaluating extracellular matrix synthesis, dermal remodeling, and cell migration assays. Below, we provide complete reconstitution concentration models, analytical validation guidelines, and handling parameters for high-throughput preclinical environments.
Quick answer
A 15mg vial of GHK-Cu (Glycyl-L-Histididyl-L-Lysine Copper Complex) contains high-purity lyophilized copper tripeptide designated strictly for laboratory research. This standardized mass allows investigators to prepare controlled working solutions for evaluating extracellular matrix synthesis, dermal remodeling, and cell migration assays. Below, we provide complete reconstitution concentration models, analytical validation guidelines, and handling parameters for high-throughput preclinical environments.
Key takeaways
- The 15mg [GHK-Cu](/research-peptides/ghk-cu) specification represents a precise quantity of lyophilized Glycyl-L-Histididyl-L-Lysine chelated to a copper (II) ion.
- Glycyl-L-Histididyl-L-Lysine Copper is a small tripeptide-copper complex with a high-affinity binding site for Cu(II).
- Accurate reconstitution is fundamental to achieving reproducible concentration curves in cellular assays.
- Repeated thermal cycling of reconstituted [GHK-Cu](/research-peptides/ghk-cu) solutions can induce peptide cleavage or dissociation of the copper ion.
GHK-Cu 15mg Vial Specifications & Mass Overview
The 15mg GHK-Cu specification represents a precise quantity of lyophilized Glycyl-L-Histididyl-L-Lysine chelated to a copper (II) ion. In vitro and preclinical research protocols often require high-precision dosing vectors where mass accuracy directly governs experimental reproducibility. A 15mg target yield allows research facilities to establish reliable stock solutions without risking multiple freeze-thaw degradation cycles associated with larger bulk containers.
As a naturally occurring copper peptide complex, GHK-Cu has been extensively evaluated in preclinical models for its role in regulating genes responsible for collagen assembly, glycosaminoglycan synthesis, and tissue remodeling. When receiving a 15mg vial, laboratory technicians observe a characteristic blue lyophilized cake resulting from the optical absorbance of the bound divalent copper ion. Ensures that all mass determinations account for both the peptide salt weight and the bound metal stoichiometry.
Note on catalog availability: While PX1 Research supplies a broad range of high-purity compounds across standardized catalog sizes, specific project requirements may dictate evaluating our primary GHK-Cu catalog offerings alongside the full spectrum of research peptides. Regardless of mass variant, all lots undergo identical ISO 17025 analytical testing to ensure structural integrity and freedom from heavy metal or microbial contaminants.
Molecular Structure, Copper Binding, and Preclinical Targets
Glycyl-L-Histididyl-L-Lysine Copper is a small tripeptide-copper complex with a high-affinity binding site for Cu(II). The histidine residue plays a crucial structural role in coordinating the copper ion, establishing a stable complex that facilitates intracellular and extracellular signal transduction pathways in cultured cell systems.
Preclinical studies suggest that GHK-Cu modulates extracellular matrix (ECM) turnover by upregulating the transcription of Type I and Type III collagen, elastin, and key structural proteoglycans such as decorin. Furthermore, in vitro assays demonstrate that the complex exerts regulatory control over matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs), maintaining a controlled environment during wound closure and tissue remodeling assays.
In addition to structural matrix modulation, research models demonstrate GHK-Cu's capacity to suppress pro-inflammatory cytokines while supporting localized cell migration, including dermal fibroblasts and vascular endothelial cells. Researchers evaluating reduced fibrotic scarring consistently monitor GHK-Cu concentration gradients in cellular culture models to determine optimal target pathways.
Reconstitution Math & Volumetric Calculations for 15mg Vials
Accurate reconstitution is fundamental to achieving reproducible concentration curves in cellular assays. When reconstituting a 15mg GHK-Cu lyophilized vial, adding varying volumes of sterile Bacteriostatic Water (0.9% benzyl alcohol) or sterile physiological saline yields specific milligram-per-milliliter (mg/mL) stock concentrations.
To calculate working concentration (C), use the equation C = Mass (mg) / Volume (mL). Below are the baseline volumetric calculations for a 15mg vial mass: - 1.0 mL Diluent Yields: 15.0 mg/mL (15,000 mcg/mL) - 1.5 mL Diluent Yields: 10.0 mg/mL (10,000 mcg/mL) - 2.0 mL Diluent Yields: 7.5 mg/mL (7,500 mcg/mL) - 3.0 mL Diluent Yields: 5.0 mg/mL (5,000 mcg/mL)
For complex dilution schemes or multi-compound assays, researchers should utilize our automated reconstitution calculator to quickly verify micro-liter delivery volumes for targeted assay plates. Ensuring correct volumetric math prevents concentration variance across experimental replicates.
Aliquot Planning and Assay Micro-Pipetting Protocol
Repeated thermal cycling of reconstituted GHK-Cu solutions can induce peptide cleavage or dissociation of the copper ion. To maintain long-term stability across extended experimental timelines, investigators must implement systematic aliquot protocols immediately following initial dissolution.
Following reconstitution under laminar flow conditions, divide the master 15mg stock solution into single-use micro-aliquots using sterile, low-binding polypropylene micro-centrifuge tubes. Standard aliquot volumes of 50 µL to 200 µL are recommended depending on daily micro-plate seeding requirements. Storage at -20°C or -80°C isolates individual working fractions from environmental fluctuations.
When micro-pipetting working solutions into cell culture media, ensure pipettes are calibrated according to ISO standards. GHK-Cu stock solutions exhibiting a distinct pale blue hue should be inspected visually prior to pipetting; any precipitation or discoloration indicates potential solution destabilization or contamination.
Analytical Quality Verification: Lot-Matched COA Standards
PX1 Research enforces stringent quality control mandates across all manufactured lots. Every peptide lot undergoes rigorous analytical characterization, verified by an independent, third-party ISO 17025 accredited laboratory prior to release. Researchers can independently examine batch credentials through our dedicated Certificate of Analysis library.
Purity is quantitatively determined using High-Performance Liquid Chromatography (HPLC) equipped with ultraviolet detection. PX1 Research mandates a minimum purity threshold of ≥98.0% for all GHK-Cu batches. High-resolution Mass Spectrometry (MS) is simultaneously performed to verify the exact molecular mass and confirm accurate copper-tripeptide coordination.
Beyond peptide identity and purity, bio-burden and endotoxin presence must be strictly limited for valid cell culture application. Every lot is subjected to Chromogenic Reagent Limulus Amebocyte Lysate (LAL) testing to confirm endotoxin levels fall below standard preclinical thresholds (<0.05 EU/mg), ensuring zero background interference in sensitive signaling assays.
Stability, Solubility, and Laboratory Storage Parameters
Lyophilized GHK-Cu exhibits high thermal stability when preserved in its desiccated state away from direct light. Long-term storage of solid vials should be maintained at -20°C. Under these controlled conditions, the peptide matrix remains stable for up to 24 months without significant degradation or copper uncoupling.
Reconstitution should be conducted using neutral pH diluents (pH 6.5–7.4). Strong acidic or alkaline solutions must be avoided, as extreme pH shifts alter the histidine coordination sphere, leading to free copper dissociation. Once dissolved, liquid working stocks stored at 2°C to 8°C should be utilized within 30 days.
Avoid exposing GHK-Cu solutions to strong chelating agents such as EDTA or EGTA in assay media unless explicitly required by the experimental design, as these agents will strip the divalent copper ion from the GHK peptide backbone, altering the molecule's biological activity profile.
Comparative Analysis: GHK-Cu within Extracellular & Regenerative Research
When evaluating compounds involved in matrix remodeling and cellular repair, laboratory protocols often compare GHK-Cu to other key research compounds. For example, while GHK-Cu specifically targets copper-dependent enzymatic pathways involved in collagen and elastin synthesis, peptides such as BPC-157 act primarily through localized angiogenic expression and growth factor upregulation.
Similarly, researchers examining tissue repair kinetics may compare GHK-Cu with TB-500 (Thymosin Beta-4 fragment) to evaluate differences in actin sequestration versus matrix metalloproteinase expression. In dermatological and matrix remodeling models, scientists also analyze alternative copper complexes like AHK-Cu alongside GHK-Cu to map cell-type-specific proliferative responses.
Understanding these functional distinctions allows research facilities to design robust multi-arm comparative studies, selecting the exact chemical sequence and metallic conjugate best suited for their specific cell line or preclinical tissue model.
Evaluating Vial Mass Requirements: 15mg vs. 20mg and 50mg Options
Selecting the correct vial size depends on the scale and duration of the planned research program. While a 15mg vial offers an optimal mass for medium-scale in vitro assays, high-throughput screening projects or long-term rodent models often necessitate larger unit volumes to preserve batch consistency across extended schedules.
For pilot studies or low-volume micro-plate screening, smaller unit masses reduce reagent waste. Conversely, laboratories executing large-scale comparative protocols frequently source standardized 50mg GHK-Cu vials to minimize batch-to-batch variation across multi-week assay runs.
Research institutions managing ongoing supply requisitions can review bulk procurement frameworks via our wholesale lab portal, ensuring standardized access to fully verified, USA-manufactured research peptides tailored to institutional requirements.
Frequently Asked Questions
What is the exact mass content of a GHK-Cu 15mg vial?
A GHK-Cu 15mg vial contains precisely 15 milligrams of lyophilized Glycyl-L-Histididyl-L-Lysine copper complex, formulated for high-precision analytical and in vitro research applications.
How do I calculate micro-gram concentrations for a 15mg GHK-Cu vial?
Concentration equals mass divided by volume. Reconstituting 15mg in 1.5 mL of diluent yields 10 mg/mL (10,000 mcg/mL). Adding 3.0 mL yields 5 mg/mL (5,000 mcg/mL). Utilize our online reconstitution calculator for specific volumetric steps.
What diluent is recommended for reconstituting GHK-Cu in laboratory settings?
Sterile Bacteriostatic Water (0.9% benzyl alcohol) or sterile 0.9% Sodium Chloride solution at neutral pH (6.5–7.4) is recommended to ensure stability and maintain copper chelation.
How should reconstituted GHK-Cu 15mg stock solutions be stored?
Reconstituted liquid stocks should be micro-aliquoted into single-use polypropylene tubes and stored at -20°C or -80°C for long-term preservation. Short-term working stocks may be kept at 2°C–8°C for up to 30 days.
How does PX1 Research verify the purity of GHK-Cu?
Every lot undergoes independent third-party ISO 17025 lab testing including HPLC (to verify ≥98.0% purity), Mass Spectrometry (to confirm molecular mass and copper coordination), and LAL assay (to confirm endotoxin levels <0.05 EU/mg).
Where can I access the lot-matched Certificate of Analysis (COA)?
Lot-matched COAs are publicly accessible via the PX1 Research COA portal by entering the specific batch number printed on the vial label.
Can GHK-Cu be combined with strong chelating agents in media?
No. Strong chelators such as EDTA or EGTA will extract the bound Cu(II) ion from the tripeptide backbone, altering the structural integrity and biological properties of the GHK-Cu complex.
Are PX1 Research peptides authorized for human administration?
No. All products supplied by PX1 Research are intended strictly for laboratory research, in vitro experimentation, and preclinical scientific studies. They are strictly not for human or veterinary use.
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All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.