GHK-Cu 10mg — Vial Spec, Reconstitution Math & COA

Overview of the GHK-Cu 10mg Research Format

In laboratory settings, the 10mg format of GHK-Cu (Glycyl-L-histidyl-L-lysine copper complex) serves as a benchmark mass for medium-throughput in vitro and preclinical assays. A standard 10mg cake provides sufficient peptide mass to prepare high-concentration master stock solutions without introducing excess headspace or waste during experimental series. Researchers managing cell culture protocols, enzymatic assays, or gene expression profiling frequently utilize the 10mg fill to balance reagent longevity against freeze-thaw degradation risks.

PX1 Research manufactures high-purity research peptides under strict quality control standards. While availability of specific fill sizes may vary across production cycles, researchers can explore our complete inventory of all peptides or view the dedicated GHK-Cu product page for current stock statuses, mass variations, and unit availability. Every lot produced, regardless of vial size, undergoes identical analytical screening to ensure structural integrity and absolute peptide content.

Molecular Profile and Chemical Specifications

GHK-Cu is a naturally occurring tripeptide-copper complex wherein the amino acid sequence Gly-His-Lys chelates a divalent copper ion (Cu2+). The molecular formula for the uncomplexed tripeptide is C14H24N6O4, with a molecular mass of approximately 340.38 g/mol. Upon chelation with copper (II), the resulting complex exhibits a characteristic deep blue hue in aqueous solution, serving as a primary visual indicator of proper coordination chemistry.

The high affinity of the GHK tripeptide for Cu2+ allows it to regulate copper bioavailability at the cellular level. In physiological and experimental systems, copper acts as an essential cofactor for enzymes such as superoxide dismutase (SOD1) and lysyl oxidase (LOX). When sourcing GHK-Cu for quantitative research, verifying the precise molar ratio of copper to peptide is critical, as unchelated free copper or excess uncomplexed peptide can alter cellular signal transduction pathways and experimental reproducibility.

Preclinical Mechanisms: ECM Synthesis and Tissue Remodeling

Preclinical studies suggest that GHK-Cu acts as a primary signaling molecule involved in tissue remodeling and extracellular matrix (ECM) homeostasis. In vitro assays using human dermal fibroblasts demonstrate that exposure to GHK-Cu upregulates the transcription and translation of Type I and Type III collagen, as well as elastin and glycosaminoglycans such as hyaluronic acid. These responses are modulated via the modulation of transforming growth factor-beta (TGF-β) superfamily signaling pathways.

Furthermore, animal models evaluating wound closure and tissue repair indicate that GHK-Cu modulates matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs). By balancing MMP-2 and MMP-9 expression relative to TIMP-1 and TIMP-2, the complex facilitates controlled collagen turnover, preventing hyper-fibrotic scarring while accelerating structural re-epithelialization. Additional in vitro data demonstrate its capacity to upregulate antioxidant enzymes, thereby reducing local reactive oxygen species (ROS) in cellular stress models.

Reconstitution Mathematics for a 10mg Vial

Accurate solubilization of a 10mg GHK-Cu vial requires calculating the final mass concentration based on the volume of reconstituting solvent added. Standard laboratory diluents include Bacteriostatic Water (0.9% benzyl alcohol) or sterile phosphate-buffered saline (PBS, pH 7.4), depending on whether the downstream application involves cell culture or enzymatic analysis. Researchers can utilize our online reconstitution calculator to quickly verify molarity and volumetric targets.

To achieve target working concentrations from a 10mg solid lyophilized cake, apply the following volumetric dilutions: • 1.0 mL Diluent: Yields a stock concentration of 10.0 mg/mL (10.0 µg/µL). • 2.0 mL Diluent: Yields a stock concentration of 5.0 mg/mL (5.0 µg/µL). • 3.0 mL Diluent: Yields a stock concentration of 3.33 mg/mL (3.33 µg/µL). • 5.0 mL Diluent: Yields a stock concentration of 2.0 mg/mL (2.0 µg/µL).

For micro-dosing in cell culture assays where microgram per milliliter (µg/mL) operational levels are required, serial dilution from these primary master stocks is strongly recommended. For example, diluting 10 µL of a 10 mg/mL master stock into 990 µL of sterile buffer produces a secondary working stock of 100 µg/mL, minimizing pipetting error across replicate wells.

Solubilization, Aliquoting, and Storage Protocols

Reconstitution should take place under a laminar flow hood using aseptic technique. Introduce the diluent slowly along the glass inner wall of the vial rather than shooting the liquid directly onto the lyophilized cake. Gentle swirl motion should be employed to achieve full dissolution; vigorous vortexing or shaking must be avoided to prevent mechanical shearing and foaming.

Once fully dissolved into an aqueous state, the GHK-Cu solution should be sub-aliquoted into polypropylene microcentrifuge tubes or cryovials. Reconstitution aliquots prevent repetitive freeze-thaw cycles, which accelerate peptide degradation and loss of copper chelation integrity. Lyophilized vials stored long-term should be maintained at -20°C or -80°C in a desiccated environment. Reconstituted stock solutions stored at 2°C to 8°C should generally be utilized within 30 days, while frozen aliquots (-80°C) remain stable for extended analytical series.

COA Issuance and Analytical Quality Controls

Every production lot of GHK-Cu synthesized for PX1 Research undergoes stringent third-party testing in an ISO 17025 accredited laboratory. A lot-matched Certificate of Analysis (COA) is issued for each batch and fill size, detailing quantitative data generated via High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS). You can review representative documents on our dedicated COA access page.

Purity parameters for PX1 Research compounds require a minimum HPLC purity threshold of ≥98.0%. Electrospray Ionization Mass Spectrometry (ESI-MS) confirms the exact molecular weight and chelation mass, verifying the absence of truncated peptide sequences or residual synthesis reagents. Additionally, bacterial endotoxin testing (LAL assay) is conducted to ensure levels remain well below standard limits (<0.05 EU/mg), ensuring compatibility with sensitive in vitro bioassays.

Comparative Analysis: GHK-Cu vs. Related Matrix Compounds

When designing tissue remodeling or extracellular matrix research protocols, investigators often evaluate GHK-Cu alongside other targeted signal peptides. For example, AHK-Cu (Ala-His-Lys copper complex) shares structural similarities but exhibits distinct binding affinities and tissue specificity, making it a common comparative control in dermal papilla gene expression assays. Similarly, non-copper signaling peptides like BPC-157 and TB-500 operate through distinct angiogenic and focal adhesion kinase pathways, offering complementary mechanisms when studied in multi-peptide cell culture models.

Vial Size Selection: Evaluating 10mg vs. Larger Formats

Selecting the optimal unit mass depends directly on the planned experimental duration and assay volume requirements. A single 10mg vial provides maximum operational flexibility for small-to-medium exploratory studies, enabling researchers to prepare fresh master stocks without committing large quantities of material to long-term storage.

For high-throughput screening, multi-plate tissue engineering runs, or institutional research groups operating under wholesale procurement programs, larger fill sizes (such as 20mg or 50mg) may offer reduced cost-per-milligram ratios and reduced vial-to-vial preparation variance. Conversely, smaller fill sizes are optimal for single-assay validation runs. Researchers should verify current inventory configurations directly via our GHK-Cu product page to select the appropriate vial size for their protocol.