Epithalon 2mg — Vial Spec, Reconstitution Math & COA

Technical Specification of the Epithalon 2mg Reagent Vial

The Epithalon 2mg vial is engineered specifically for low-throughput exploratory screens, baseline calibration assays, and micro-volume cell culture protocols where minimal total peptide mass is required per experimental run. Containing precisely 2.0 milligrams of the synthetic tetrapeptide Epithalon (Ala-Glu-Asp-Gly, MW ~390.35 g/mol) in a lyophilized cake form, this unit mass allows primary investigators to prepare working stock solutions without exposing larger reagent stocks to repeated thermal cycles or prolonged liquid storage.

While low-mass formats like the 2mg vial provide exceptional flexibility for preliminary dosage-range finding in cell models, research groups managing high-throughput screens or multi-cohort animal trials frequently opt for larger unit masses to streamline workflow economics. Researchers evaluating current catalog options can view current availability directly on our Epithalon product page or explore our complete catalog of high-purity research peptides for alternative fill sizes.

Each unit produced by PX1 Research is packaged in an ISO 7 cleanroom environment within USP Type I borosilicate glass vials, sealed under an inert nitrogen headspace with a butyl rubber stopper and flip-off aluminum seal. This packaging configuration protects the lyophilized peptide matrix against moisture infiltration, atmospheric oxidation, and structural degradation during transit and storage.

Bioregulatory Mechanism: Telomerase Activation & Chromatin Dynamics

Epithalon (also identified in scientific literature as Epitalon) was originally synthesized as a short-chain peptide analog of epithalamin, a natural pineal gland extract. In preclinical models, Epithalon functions primarily as a epigenetic bioregulator. In vitro studies on human somatic cell cultures indicate that the tetrapeptide interacts directly with histones and specific promoter regions on genomic DNA, inducing chromatin unwinding and upregulating catalytic human telomerase reverse transcriptase (hTERT) gene expression.

Telomerase activation driven by Epithalon has been observed in vitro to promote telomere elongation, extend the functional Hayflick limit of somatic fibroblasts, and attenuate cellular senescence markers. Preclinical animal models also demonstrate that Epithalon administration influences pineal polypeptide secretion, partially restoring circadian rhythms and endogenous melatonin synthesis pathways degraded by chronological aging.

Because Epithalon operates via direct peptide-DNA binding rather than cell-surface receptor cascades, maintaining precise molar concentrations in culture media is paramount for reproducible data collection. Investigators studying baseline cell dynamics or comparative longevity pathways can reference current literature summaries in our research library hub to align assay parameters.

Reconstitution Mathematics for 2mg Epithalon Vials

Reconstitution calculations for low-mass vials require precise volumetric planning to achieve desired working concentrations (expressed in µg/mL or mM) without exceeding standard liquid handling limitations. A 2mg (2,000 µg) vial of Epithalon yields predictable stock concentrations when reconstituted with standard laboratory diluents such as 0.9% Bacteriostatic Sodium Chloride or Sterile Water for Injection.

When 1.0 mL of diluent is introduced into a 2mg vial, the resulting stock concentration is exactly 2.0 mg/mL (2,000 µg/mL or 2.0 µg/µL). At this dilution, a 10 µL transfer pipetted into an assay vessel delivers 20 µg of active tetrapeptide. If the reconstitution volume is increased to 2.0 mL, the resulting concentration is 1.0 mg/mL (1,000 µg/mL or 1.0 µg/µL), yielding 10 µg per 10 µL volumetric aliquot.

For protocols requiring lower stock concentrations or larger volumetric dispensing precision, adding 3.0 mL of diluent achieves a stock concentration of approximately 0.667 mg/mL (666.7 µg/mL or 6.67 µg/µL). Investigators calculating specific molarity or micro-dosing dilutions for custom cell culture plates can utilize our interactive reconstitution calculator to eliminate manual conversion error prior to reagent reconstitution.

Aliquot Management, Solubilization, and Liquid Storage Protocols

To maximize reagent stability following reconstitution, laboratory technicians should observe strict liquid handling protocols. Lyophilized Epithalon dissolves rapidly upon contact with aqueous media; however, gentle manual rotation or slow tilt-inversion of the vial is recommended to achieve complete dissolution. High-shear mechanical vortexing or vigorous shaking must be avoided to prevent surface denaturation or foam generation.

Once fully dissolved, the stock solution should be immediately divided into single-use micro-aliquots using sterile, low-binding polypropylene microcentrifuge tubes. Reconstituted peptide stock subjected to repeated freeze-thaw cycles suffers progressive molecular degradation due to ice crystal formation and local concentration gradients. Aliquoting ensures that individual research samples are thawed only once prior to plate loading or animal model dosing protocols.

Liquid stock aliquots stored at -20°C remain stable for up to 3 to 6 months, whereas deep-freeze storage at -80°C maintains integrity for up to 12 months. Diluted working solutions kept at 2°C to 8°C should be consumed within 7 to 14 days, provided a suitable antimicrobial preservative (such as 0.9% benzyl alcohol) is present in the reconstituting diluent.

Quality Verification: Lot-Specific COA, HPLC, and MS Analysis

At PX1 Research, every production batch of Epithalon undergoes rigorous analytical characterization prior to distribution. We provide a lot-matched Certificate of Analysis (COA) for every fill size, verifying peptide identity, chemical purity, mass accuracy, and bio-burden safety limits. Laboratory managers can independently access and download these analytical records via our central COA verification portal.

Purity is quantitatively determined using High-Performance Liquid Chromatography (HPLC) with ultraviolet detection set at 214 nm and 280 nm. PX1 Research mandates a minimum threshold of ≥98% purity, ensuring that side-products, truncated sequences, and residual protecting groups are excluded from experimental systems. Electrospray Ionization Mass Spectrometry (ESI-MS) confirms the exact molecular mass (390.35 Da ± 0.5 Da), validating sequence fidelity.

Because sub-standard reagents introduce inflammatory artifacts into delicate cellular assays, PX1 products are subjected to chromogenic Limulus Amebocyte Lysate (LAL) testing. All lots are certified to contain <0.01 EU/mg of bacterial endotoxins. Furthermore, manufacturing occurs in ISO-certified, GMP-compliant domestic facilities to guarantee lot-to-lot consistency across all research projects.

Comparative Analysis: Epithalon vs. Related Bioregulators & Peptides

In cell biology and experimental gerontology models, Epithalon is frequently evaluated alongside or in contrast with other synthetic bioregulators and metabolic modulators. While Epithalon targets nuclear hTERT expression and telomere preservation, compounds such as the mitochondrial-derived peptide MOTS-c operate primarily through AMPK activation and metabolic homeostasis pathways. Meanwhile, tissue remodeling models often utilize the copper-binding tripeptide GHK-Cu for its extracellular matrix modulation and gene transcription signaling, or growth axis peptides such as CJC-1295 No DAC to observe somatotropic axis interactions.

The distinct non-receptor, chromatin-binding mechanism of Epithalon makes it an ideal reference standard when isolating telomere-dependent biological outcomes from broader metabolic or peptide-receptor signaling cascades. Comparative multi-peptide screens benefit from using standardized analytical grade reagents across all comparative experimental arms to eliminate purity-induced variance.

Vial Selection: 2mg Low-Volume Vials vs. High-Mass Bulk Supplies

Selecting the appropriate vial mass depends entirely on the design and scale of the research protocol. The 2mg vial is perfectly suited for exploratory pilot studies, single-plate in vitro toxicity testing, or laboratory validation runs where short liquid stability windows make larger mass stocks impractical. Utilizing a 2mg format minimizes waste and reduces reagent degradation associated with long-term liquid storage.

Conversely, research laboratories conducting multi-week animal studies or high-throughput automated screening programs typically require larger total peptide mass. If your organization requires high-volume routine screening or custom mass configurations not currently listed, PX1 Research provides scalable procurement solutions and institutional discounts through our dedicated wholesale laboratory program.

Regardless of whether your project requires 2mg reference units or multi-gram bulk production runs, PX1 maintains strict adherence to ISO 17025 analytical standards and USA-based manufacturing compliance to safeguard the reproducibility of your scientific findings.