епіталон (Epithalon) is a synthetic pineal tetrapeptide extensively studied in preclinical models for its role in telomerase activation, telomere maintenance, and circadian rhythm regulation. Maintaining exact storage temperatures and handling protocols is essential for protecting peptide stability during in vitro experiments. This guide outlines standard laboratory storage parameters, thermal degradation risks, and quality verification metrics for research-grade епіталон.
епіталон (Epithalon) is a synthetic pineal tetrapeptide extensively studied in preclinical models for its role in telomerase activation, telomere maintenance, and circadian rhythm regulation. Maintaining exact storage temperatures and handling protocols is essential for protecting peptide stability during in vitro experiments. This guide outlines standard laboratory storage parameters, thermal degradation risks, and quality verification metrics for research-grade епіталон.
For optimal structural stability, lyophilized епіталон (Epithalon) should be stored long-term at -20°C to -80°C in a desiccated environment protected from light exposure. Under these conditions, the un-reconstituted dry powder retains purity for up to 24 months. Short-term room temperature exposure during shipping (up to 7 days) does not compromise molecular integrity.
When evaluating the biochemical profile of synthetic pineal peptides like епіталон, controlling environmental temperature is critical. Freezing suppresses chemical reactions, such as hydrolysis and oxidation, that degrade peptide bonds over time. Researchers preparing assays for telomere maintenance research must establish rigorous cold-chain protocols immediately upon receiving shipped lyophilized vials.
епіталон is a synthetic tetrapeptide consisting of the amino acid sequence Ala-Glu-Asp-Gly (Ala-Glu-Asp-Gly-OH). Discovered through investigations into pineal gland extracts, it functions as a peptide bioregulator. Preclinical studies suggest that епіталон acts on chromatin structure to modulate gene expression, specifically inducing telomerase activity in mammalian somatic cell cultures.
In vitro assays demonstrate that telomerase expression induced by епіталон allows cultured somatic cells to surpass the Hayflick limit by facilitating telomere elongation. Furthermore, animal models indicate that this tetrapeptide influences melatonin synthesis and circadian rhythm alignment by regulating pineal gene expression. To ensure reproducible results across cellular assays, researchers must maintain consistent peptide concentration and structural integrity through validated handling protocols.
The physical state of епіталон dictates its thermal sensitivity. In its lyophilized (freeze-dried) state, the absence of aqueous solvent significantly limits hydrolytic cleavage. Dry peptide vials stored at -20°C remain stable for 24 months, whereas storage at room temperature (20°C to 25°C) should be restricted to short transit periods not exceeding 5 to 7 days.
Once reconstituted in liquid media, the stability timeline accelerates dramatically. Aqueous solutions of епіталон stored at 4°C (standard laboratory refrigeration) remain stable for up to 3 to 4 weeks. If the reconstituted solution must be stored for longer periods, aliquoting the solution into single-use microcentrifuge tubes and freezing at -20°C or -80°C is required to prevent multiple freeze-thaw cycles. Comprehensive guidelines on reconstitution parameters can be accessed in our peptide storage guide.
Reconstitution of епіталон requires sterile, laboratory-grade solvents based on the intended downstream in vitro application. Sterile Bacteriostatic Water (containing 0.9% benzyl alcohol) is recommended for multi-dose laboratory assays stored at 4°C, as the preservative inhibits microbial growth. For sensitive cell culture assays where benzyl alcohol may induce cellular toxicity, sterile 0.9% Normal Saline or phosphate-buffered saline (PBS) should be utilized.
When reconstituting lyophilized research peptides, solvent should be directed down the inner glass wall of the vial rather than sprayed directly onto the peptide cake. Gentle swirl motion is recommended to dissolve the cake completely; vortexing or vigorous agitation must be avoided to prevent mechanical shearing of the peptide structure. To calculate exact molar concentrations and liquid volume ratios, scientists can utilize our peptide reconstitution calculator.
Repeated freeze-thaw cycles pose a significant risk to the structural stability of reconstituted епіталон. Each freeze cycle subjects dissolved peptides to ice crystal formation and localized pH shifts, which induce physical stress, aggregation, and peptide bond cleavage. Experimental data indicate that after three consecutive freeze-thaw cycles, functional peptide concentration decreases measureably due to precipitation and degradation.
To mitigate freeze-thaw degradation, laboratory technicians should aliquot the freshly reconstituted solution into working volumes required for single experimental runs. Aliquots should be stored in polypropylene microcentrifuge tubes at -20°C or -80°C until needed. Once an aliquot is thawed for an assay, any remaining portion should be maintained at 4°C and consumed within 48 hours rather than refrozen.
Reliable preclinical research requires raw materials verified by stringent analytical metrics. PX1 Research mandates third-party batch testing for every production lot to guarantee consistent molecular weight, sequence fidelity, and chemical purity. Researchers evaluating suppliers should insist on high-performance liquid chromatography (HPLC) and mass spectrometry (MS) characterization.
The table below highlights the standard analytical criteria applied to PX1 Research compounds:
• Purity Level: ≥98.0% verified via Reversed-Phase HPLC (RP-HPLC). • Mass Identification: Mass-to-charge ratio verified via Mass Spectrometry (MS). • Endotoxin Content: <0.05 EU/mg tested via Chromogenic LAL assay. • Physical Form: Lyophilized white cake/powder with uniform moisture content. • Manufacturing Origin: Synthesized in ISO 17025 accredited, GMP-compliant US facilities.
Access to complete documentation for every batch is accessible directly through our PX1 research database.
Short-chain bioregulatory peptides exhibit varying stability profiles based on their amino acid length, net charge, and sequence hydrophobicity. Comparing епіталон to related research bioregulators provides insight into optimal handling protocols across target classes.
When evaluated alongside related compounds such as thymalin and pinealon, епіталон demonstrates high stability in lyophilized form due to its short 4-amino acid sequence (Ala-Glu-Asp-Gly). While pinealon (Glu-Asp-Arg) exhibits comparable thermal resilience in dry states, larger peptide complexes like thymalin require stricter thermal controls to prevent denaturation. All three bioregulators require sub-zero storage (-20°C) post-reconstitution to preserve primary peptide structures across extended research timelines.
In addition to ambient temperature, atmospheric moisture (humidity) and light exposure (photolysis) accelerate peptide degradation. Lyophilized powders are highly hygroscopic; exposure to ambient room air allows water vapor absorption, initiating spontaneous hydrolytic cleavage of peptide bonds even at reduced temperatures.
To prevent moisture intrusion, vial stoppers must remain hermetically sealed with aluminum flip-off caps until reconstitution. Store vials inside desiccated container units or sealed foil pouches containing silica packets. Furthermore, container glass should be opaque or stored in dark cold-storage units to protect light-sensitive amino acid residues from UV-induced photolytic breakdown.
Maintaining chemical purity across the supply chain requires controlled manufacturing and rapid dispatch protocols. PX1 Research manufactures all research peptides in USA-based GMP-compliant laboratories under ISO 17025 quality systems, ensuring precise synthesis and immediate vacuum sealing.
Orders are dispatched same-day (Monday through Friday) from centralized fulfillment centers located in California and Arizona. This strategic dual-hub shipping model minimizes transit times across North America, ensuring that lyophilized compounds arrive at research facilities without thermal degradation. Institutional accounts and high-volume procurement programs can explore custom synthesis and bulk ordering via our wholesale portal.
What is the correct storage temperature for епіталон?
Lyophilized епіталон should be stored long-term at -20°C to -80°C in a dry, dark environment. Once reconstituted in sterile liquid, the solution should be stored at 4°C for short-term use (up to 3-4 weeks) or aliquoted and frozen at -20°C for extended storage.
How long is lyophilized епіталон stable at room temperature?
In its dry lyophilized state, епіталон remains chemically stable at ambient room temperature (20°C to 25°C) for up to 5 to 7 days during transit. Upon receipt in the laboratory, vials should immediately be transferred to cold storage at -20°C.
Can reconstituted епіталон be refrozen after thawing?
Refreezing reconstituted епіталон multiple times is not recommended as repeated freeze-thaw cycles cause mechanical shearing, peptide aggregation, and loss of functional potency. Reconstituted solutions should be aliquoted into single-use volumes prior to initial freezing.
What solvent is best for reconstituting епіталон for cell culture assays?
For in vitro cell culture assays, sterile 0.9% Normal Saline or Phosphate-Buffered Saline (PBS) is recommended to prevent cytotoxicity. If multi-dose stability is required for standard bench research, Bacteriostatic Water containing 0.9% benzyl alcohol can be used.
What is the primary mechanism investigated in епіталон research?
Preclinical studies investigate епіталон for its capacity to activate telomerase enzyme expression, promote telomere elongation in somatic cells, regulate pineal chromatin structure, and restore circadian melatonin secretion patterns in animal models.
How does PX1 Research verify the purity of епіталон?
Every lot of епіталон undergoes independent third-party analysis using Reversed-Phase High-Performance Liquid Chromatography (RP-HPLC) to verify purity (≥98.0%) and Mass Spectrometry (MS) to confirm sequence molecular mass. Certificates of Analysis (COA) are provided with every batch.
What are the endotoxin limits for PX1 Research peptides?
PX1 Research peptides are tested via Chromogenic LAL assays to ensure endotoxin levels remain below 0.05 EU/mg, preventing endotoxin-induced interference in sensitive cellular assays.
What is the chemical sequence of the епіталон tetrapeptide?
епіталон (Epithalon) is a synthetic tetrapeptide with the primary amino acid sequence L-alanyl-L-alpha-glutamyl-L-alpha-aspartyl-glycine (Ala-Glu-Asp-Gly).
Where is PX1 Research епіталон manufactured and shipped from?
All PX1 Research compounds are manufactured in US-based GMP-compliant facilities and shipped same-day (M-F) from logistics hubs in California and Arizona.
How should епіталон be protected from moisture and photolysis?
Vials should be kept in sealed containers with silica desiccant packs to prevent ambient moisture absorption. Vials must also be stored in dark cold-storage units or aluminum foil to shield the compound from light exposure.
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.