TB-500 20mg — Vial Spec, Reconstitution Math & COA
A 20mg vial of TB-500 provides high-mass, laboratory-grade synthetic Thymosin Beta-4 active fragment designed for extensive, multi-well in vitro assays and long-term preclinical research models. Principal investigators requiring consistent batch parameters across large experimental cohorts frequently select higher mass formats to minimize inter-vial variance and simplify stock solution handling. PX1 Research outlines the physical characteristics, exact volumetric calculations, quality control standards, and storage protocols necessary for working with high-yield TB-500 preparations.
Quick answer
A 20mg vial of TB-500 provides high-mass, laboratory-grade synthetic Thymosin Beta-4 active fragment designed for extensive, multi-well in vitro assays and long-term preclinical research models. Principal investigators requiring consistent batch parameters across large experimental cohorts frequently select higher mass formats to minimize inter-vial variance and simplify stock solution handling. PX1 Research outlines the physical characteristics, exact volumetric calculations, quality control standards, and storage protocols necessary for working with high-yield TB-500 preparations.
Key takeaways
- A 20mg vial of [tb-500](/research-peptides/tb-500) contains a high-concentration lyophilized cake composed of the synthetic acetylated peptide fragment corresponding to the active region of Thymosin Beta-4 (specifically the N-terminal sequence Ac-SDKP or the central actin-binding domain LKKTETQ).
- [TB-500](/research-peptides/tb-500) is classified primarily as a regeneration peptide, functioning as an essential regulator of monomeric G-actin sequestration.
- Reconstituting a 20mg lyophilized peptide vial requires accurate volumetric planning to achieve target concentrations for precise micro-pipetting.
- Once reconstituted, high-concentration peptide stock solutions are susceptible to hydrolysis and enzymatic degradation if maintained at room temperature or subjected to multiple freeze-thaw cycles.
TB-500 20mg Specification & Stock Availability
A 20mg vial of tb-500 contains a high-concentration lyophilized cake composed of the synthetic acetylated peptide fragment corresponding to the active region of Thymosin Beta-4 (specifically the N-terminal sequence Ac-SDKP or the central actin-binding domain LKKTETQ). This 20mg quantity is specifically requested by institutional research groups conducting high-throughput cell migration assays, multi-cage rodent models, or high-density wound-healing research where consistent continuous dosing from a single analytical batch is essential to reduce variables.
It is important to note that while high-mass options like 20mg are widely discussed in methodological literature, PX1 Research currently fulfills demand through precision-capped TB-500 10mg vials. Providing 10mg formats ensures optimal cake stability, minimal moisture retention during lyophilization, and reduced risk of peptide degradation from repeated freeze-thaw cycles. Principal investigators can review our full catalog of research compounds by visiting all peptides to select the ideal mass configuration for their current assay design.
Biological Mechanisms in Preclinical Models
TB-500 is classified primarily as a regeneration peptide, functioning as an essential regulator of monomeric G-actin sequestration. In cell-free and cultured cell assays, the active sequence sequesters G-actin monomers, preventing spontaneous polymerization into F-actin filaments until specific extracellular signaling events occur. This dynamic actin modulation is critical for regulating cell structure, cellular motility, and focal adhesion dynamics during tissue remodeling research.
Preclinical studies suggest that TB-500 plays a significant role in promoting microvascular endothelial cell migration, accelerated angiogenesis (blood-vessel formation), and enhanced flexibility during soft-tissue and muscle-fiber recovery models. In vitro data indicate that exposure to synthetic Thymosin Beta-4 derivatives upregulates matrix metalloproteinases (MMPs) and decreases local inflammatory cytokine expression, facilitating rapid cell displacement across damaged extracellular matrix scaffolding without disrupting overall cellular viability.
Precision Reconstitution Math for 20mg Vials
Reconstituting a 20mg lyophilized peptide vial requires accurate volumetric planning to achieve target concentrations for precise micro-pipetting. Researchers must calculate the resulting concentration per microliter (µL) based on the volume of bacteriostatic water or sterile 0.9% sodium chloride added to the vial. Utilizing an automated reconstitution calculator is recommended to prevent mathematical errors in working stock preparation.
When 1.0 mL of sterile diluent is added to a 20mg vial of TB-500, the final concentration is 20.0 mg/mL, which equals 20.0 µg per microliter (µL). If 2.0 mL of diluent is introduced, the concentration drops to 10.0 mg/mL (10.0 µg/µL). Adding 3.0 mL of diluent yields a final working concentration of 6.67 mg/mL (6.67 µg/µL). For precise micro-dosing in 96-well cell culture plates, a higher dilution volume (e.g., 2.0 mL or 3.0 mL) is often preferred to allow larger, more manageable pipetting volumes that minimize volumetric transfer tolerances.
Aliquot Planning and Cryogenic Preservation Protocols
Once reconstituted, high-concentration peptide stock solutions are susceptible to hydrolysis and enzymatic degradation if maintained at room temperature or subjected to multiple freeze-thaw cycles. To preserve peptide integrity over an extended testing timeline, laboratories utilizing high-mass vials must execute an aliquotting protocol immediately following full dissolution.
Reconstituted TB-500 stock should be divided into single-use microcentrifuge tubes (e.g., 100 µL to 250 µL per aliquot) using low-binding polypropylene tubes. These aliquots must be rapidly frozen at -20°C or -80°C for long-term storage. Individual working aliquots should be thawed at 4°C immediately prior to use in assays and never returned to freezer storage after thawing. Unopened, vacuum-sealed lyophilized vials maintain maximum stability when stored at -20°C in a dry environment protected from light.
Comparative Regenerative Peptide Class Analysis
Within tissue repair and structural matrix research, TB-500 is frequently evaluated alongside other prominent peptide classes to compare cellular signaling pathways and tissue repair dynamics. Researchers often compare its actin-binding mechanisms with synthetic organoprotective peptides like BPC-157, which targets nitric oxide pathway modulation and focal adhesion kinase activation, as well as copper-binding complexes like GHK-Cu, which regulates gene expression for collagen synthesis and extracellular matrix remodeling.
While BPC-157 is predominantly investigated for gastrointestinal and tendon-to-bone junction stability, and GHK-Cu is utilized in dermal and fibroblast differentiation studies, TB-500 stands out for its unique ability to diffuse through tissue fluids, bind actin monomers, and promote systemic cell migration to sites of mechanical stress. Integrating these distinct chemical classes allows multi-disciplinary research teams to investigate synergistic cellular signaling during complex tissue regeneration experiments.
Analytical Quality Standards & COA Issuance
Every batch of research peptide provided by PX1 Research undergoes stringent analytical testing in an ISO 17025 accredited laboratory to verify identity, purity, and safety profiles. High-mass vials such as 20mg formulations require rigorous testing to confirm that no aggregation, truncated sequences, or residual manufacturing solvents remain within the final lyophilized cake.
Quality verification is documented through a lot-matched Certificate of Analysis, accessible directly via our COA directory. Testing methodologies include High-Performance Liquid Chromatography (HPLC) to guarantee a purity threshold of at least 98.0%, coupled with Mass Spectrometry (MS) to confirm exact molecular weight. Furthermore, all lots undergo kinetic chromogenic LAL assays to ensure endotoxin levels remain strictly under standard laboratory limits (<0.01 EU/mg), protecting sensitive cell culture environments from bacterial pyrogen contamination.
Selecting Optimal Fill Sizes: 2mg vs 5mg vs 10mg vs 20mg
Selecting the correct vial size depends entirely on the design, duration, and scale of the planned experimental protocol. Large 20mg formats are optimal for large-scale institutional assays requiring a single baseline lot to prevent batch-to-batch analytical drift across hundreds of experimental wells. However, larger mass vials require strict storage protocols once reconstituted.
For smaller scale exploratory studies, individual animal group cohorts, or short-term assays, standard 2mg, 5mg, or TB-500 10mg vials are typically more practical. Choosing smaller fill sizes reduces the duration that reconstituted solution remains liquid, decreasing the risk of accidental thermal degradation or contamination during laboratory handling. Research facilities needing bulk quantities across multiple fill sizes can also review our wholesale account options for specialized volume allocations.
In Vitro & Preclinical Experimental Applications
In cell culture environments, synthetic TB-500 is added to growth media to observe endothelial cell capillary tube formation, keratenocyte motility, and fibroblast proliferation rates. Preclinical animal models investigate the peptide's effects on myocardial tissue remodeling post-ischemic injury, skeletal muscle alignment following strain induction, and dermal wound margin closure speeds.
Researchers analyzing these processes utilize precise concentrations ranging from 10 ng/mL to 1 µg/mL in cell culture media, while rodent models typically employ weight-adjusted micro-dose protocols. All experiments using TB-500 must strictly adhere to institutional biosafety guidelines and undergo approval by Institutional Animal Care and Use Committees (IACUC) or regional research governance bodies. Comprehensive research literature and protocol guidelines are available in the PX1 research library.
Frequently Asked Questions
What is the physical state of a 20mg TB-500 vial upon delivery?
TB-500 is supplied as a sterile, lyophilized (freeze-dried) white powder or solid cake in a sealed glass vial under vacuum. It must be reconstituted with an appropriate liquid diluent prior to laboratory application.
How do I calculate the concentration of a 20mg TB-500 vial reconstituted with 2mL of water?
Dividing 20mg by 2.0 mL yields a final working concentration of 10.0 mg/mL (10.0 µg per microliter). You can use our online reconstitution calculator to verify custom volumetric dilutions.
Does PX1 Research offer a 20mg TB-500 vial size?
PX1 Research currently offers high-purity TB-500 in 10mg fill sizes to ensure optimum lyophilization efficiency and minimal reconstitution degradation. Multiple 10mg vials can be ordered to achieve equivalent total mass requirements.
What is the recommended reconstitution diluent for TB-500?
Sterile Bacteriostatic Water (0.9% benzyl alcohol) is standard for multi-use working solutions intended for short-term refrigerated storage. Sterile 0.9% Sodium Chloride or USP Water for Injection may also be used for immediate single-use assays.
How should reconstituted TB-500 stock solutions be stored?
Reconstituted stock solutions should be stored at 2°C to 8°C for short-term use (up to 28 days if reconstituted with bacteriostatic water). For long-term preservation, stock solutions should be aliquoted and frozen at -20°C or -80°C.
What are the analytical purity standards for PX1 Research peptides?
All PX1 Research peptides are verified to possess a minimum purity of 98.0% via HPLC analysis. Every lot is also tested for mass identity via Mass Spectrometry and endotoxin levels via LAL assays.
Where can I locate the Certificate of Analysis (COA) for my specific lot?
Lot-matched Certificates of Analysis containing complete HPLC chromatograms, mass spectra, and endotoxin assay results are accessible on our dedicated COA lookup page.
Is TB-500 intended for human or veterinary administration?
No. All products provided by PX1 Research, including TB-500, are strictly intended for laboratory research, in vitro assays, and preclinical animal studies. Human or veterinary administration is strictly prohibited.
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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.