Klow (internal code: Klow) is a multi-component research formulation combining four well-characterised bioactive peptides and peptide-copper complexes: GHK-Cu (50 mg), TB-500 (10 mg), BPC-157 (10 mg), and KPV (10 mg). Each constituent has an independent and extensively documented research profile, making Klow a composite tool for investigators studying tissue remodelling, cellular repair signalling, and inflammatory pathway modulation in preclinical and in vitro settings. Supplied as a lyophilised powder at ≥98% purity, Klow is intended strictly for research use only and is not for human consumption.
The four components within Klow represent distinct structural and functional classes. GHK-Cu is a naturally occurring copper-binding tripeptide (Gly-His-Lys) identified in human plasma, saliva, and urine, noted for its reported influence on collagen synthesis gene networks and antioxidant enzyme expression. TB-500 is a synthetic analogue of the C-terminal region of Thymosin Beta-4, a 43-amino-acid actin-sequestering protein implicated in cytoskeletal dynamics and endothelial migration. BPC-157 (Body Protection Compound-157) is a pentadecapeptide derived from a partial sequence of human gastric juice protein BPC, extensively studied for its interactions with growth factor receptor pathways. KPV is a C-terminal tripeptide (Lys-Pro-Val) fragment of α-Melanocyte-Stimulating Hormone (α-MSH), recognised for its engagement with melanocortin receptors—particularly MC1R—in the context of cellular inflammation signalling research.
The research rationale for combining these compounds in a single formulation such as Klow stems from the partly complementary and partly overlapping signalling environments each peptide is thought to engage. Investigators working in wound biology, fibrosis modelling, angiogenesis studies, and NF-κB pathway interrogation may find Klow a time-efficient vehicle for examining multi-pathway crosstalk within a single experimental cohort. Each component retains its individual biochemical identity within the lyophilised matrix, allowing dissolution in appropriate aqueous buffers for downstream assay use. Klow is stored at −20 °C and should be reconstituted under sterile conditions according to established laboratory protocols.
Research Applications
≥98% purity. Lyophilized powder. Storage: -20°C. For research purposes only.
Mechanism of Action
The constituent peptides within Klow engage distinct but potentially intersecting biochemical pathways. GHK-Cu coordinates copper(II) ions through its histidine imidazole and terminal amine groups, modulating superoxide dismutase activity and influencing the expression of collagen I, collagen III, and matrix metalloproteinases (MMPs) via TGF-β and SPARC-associated gene regulation. TB-500 competitively binds G-actin through its LKKTET core motif, reducing cytoskeletal polymerisation pressure and has been shown in preclinical models to upregulate Thymosin Beta-4-responsive genes associated with integrin-linked kinase (ILK) signalling, promoting endothelial and myogenic cell migration. BPC-157 has been characterised as interacting with the VEGFR2/FAK/paxillin axis and the nitric oxide (NO) system, with reported modulatory effects on EGR-1 transcription factor activity relevant to angiogenic tube formation assays.
KPV exerts its reported anti-inflammatory activity through direct agonism at melanocortin-1 receptor (MC1R), leading to downregulation of NF-κB nuclear translocation and consequent reduction in pro-inflammatory cytokine transcription (IL-1β, TNF-α, IL-6) in macrophage and epithelial cell models. Together, the combination within Klow allows researchers to interrogate whether concurrent engagement of copper-dependent redox pathways, actin-cytoskeletal remodelling, growth factor receptor crosstalk, and melanocortin receptor signalling produces additive, synergistic, or antagonistic cellular outcomes—a question of direct relevance to complex tissue repair cascade research.
Research Applications
Klow, by virtue of its multi-component peptide composition, supports a range of in vitro and preclinical research applications where simultaneous or comparative modulation of repair-associated signalling networks is of scientific interest. For research use only. Not for human consumption.
Fibroblast proliferation and migration assays: Investigation of GHK-Cu- and BPC-157-mediated effects on dermal fibroblast scratch-wound closure and collagen matrix deposition in 2D and 3D culture models.
Angiogenesis and tube formation studies: Evaluation of TB-500 and BPC-157 contributions to HUVEC or HMEC-1 capillary-like network formation in Matrigel-based or microfluidic assay systems.
NF-κB and cytokine pathway modulation: Use of the KPV component in macrophage (RAW 264.7, THP-1) models to assess MC1R-mediated suppression of inflammatory transcription factors and cytokine secretion profiles.
Oxidative stress and antioxidant enzyme expression: GHK-Cu-focused studies examining SOD1/SOD2 and catalase mRNA or protein expression changes under oxidative challenge conditions in hepatic or neuronal cell lines.
Cytoskeletal dynamics and cell motility research: Quantification of TB-500-driven G-actin sequestration effects using fluorescence-based F-actin/G-actin ratio assays or live-cell imaging of migratory phenotypes.
Multi-pathway crosstalk modelling: Preclinical in vivo or ex vivo tissue explant studies exploring combinatorial peptide interactions across growth factor receptor, melanocortin, and copper-dependent signalling axes simultaneously.
Storage & Handling Guidelines
Proper storage and handling are essential to maintain peptide integrity and ensure reliable research results. All Pepitiva Biolabs peptides are supplied as lyophilized (freeze-dried) powder, which provides excellent long-term stability when stored correctly. Store lyophilized peptides at -20°C for long-term storage or 2-8°C for short-term use. Once reconstituted, peptide solutions should be stored at 2-8°C and used within the timeframe specified in the product documentation. Always use sterile bacteriostatic water for reconstitution and handle peptides in a clean laboratory environment to prevent contamination. Avoid repeated freeze-thaw cycles, as thermal stress can cause peptide degradation and loss of biological activity.
Quality Control & Certification
This product is manufactured under strict quality control protocols and has been verified through comprehensive analytical testing. Each batch undergoes reverse-phase HPLC analysis for purity determination and electrospray ionization mass spectrometry (ESI-MS) for molecular identity confirmation. A detailed Certificate of Analysis (COA) is available for download, documenting purity percentage, molecular weight verification, appearance, and recommended storage conditions. Pepitiva Biolabs maintains batch-level traceability from synthesis through delivery, ensuring complete transparency and quality assurance for your research.
Frequently Asked Questions
Is this product approved for human use?
No. This product is intended exclusively for in vitro scientific research and laboratory use. It is not approved for human or veterinary use, not intended for diagnostic or therapeutic purposes, and should not be administered to humans or animals under any circumstances.
How do I reconstitute this peptide?
Add sterile bacteriostatic water slowly to the vial, directing the stream against the glass wall rather than directly onto the lyophilized powder. Gently swirl the vial until the powder is fully dissolved — do not shake vigorously. The recommended reconstitution volume depends on your desired concentration. Refer to the product documentation for specific guidance.
Can I get a Certificate of Analysis (COA)?
Yes. A Certificate of Analysis is included with every order and is also available for download from the product page. The COA documents HPLC purity, mass spectrometry identity confirmation, batch number, production date, and storage recommendations.
For research use only. Not for human consumption.
Related Peptides
Exclusive≥98%
Regeneration
Glow
GHK-Cu 50mg + TB-500 10mg + BPC-157 10mg — offered under the Pepitiva Biolabs internal code Glow — i...
