Premium TB-500 Research Peptide — High-Purity Thymosin Beta-4 Fragment for Laboratory Use

Product Overview

Premium TB-500 is a research-grade synthetic peptide derived from the naturally occurring protein thymosin beta-4. It corresponds to the bioactive region of thymosin beta-4 and is supplied as a sterile lyophilized powder in sealed vials. Each package contains ten vials, with each vial holding 10mg of the research compound. This product is manufactured exclusively for scientific investigation and in vitro laboratory experimentation.

Key Specifications at a Glance:

• Quantity: 10mg per vial, 10 vials per pack

• Form: Lyophilized (freeze-dried) powder

• Purity: ≥98% verified by third-party testing

• Molecular Formula: C₂₁₂H₃₅₀N₅₆O₇₈S

• Molecular Mass: 4963.5

• CAS Number: 885340-08-9

• Sequence: Ac-LKKTETQ (acetylated heptapeptide)

• Synonyms: Thymosin beta-4 fragment, TB4 fragment

• Research Use Only: Not for human or animal consumption

Understanding TB-500: The Research Context

TB-500 is a synthetic research peptide that corresponds to a key bioactive fragment of thymosin beta-4 (TB4). Thymosin beta-4 is a naturally occurring 43-amino acid protein found in virtually all human and animal cells. It plays multiple roles in cellular biology, including actin sequestration, cell migration, and tissue organization. The TB-500 fragment represents the minimal active sequence responsible for many of these biological activities.

Key Research Interests:

• Actin binding and cytoskeletal dynamics

• Endothelial cell migration and angiogenesis

• Cell motility and tissue remodeling

• Wound healing and re‑epithelialization

• In vitro cell culture investigations

Researchers utilize TB-500 in controlled laboratory settings to study the mechanisms of cell migration, actin polymerization, and tissue organization. The peptide is of particular interest to investigators focused on wound healing, vascular biology, and the fundamental processes of cellular movement and repair.

The Significance of Thymosin Beta-4 Research:
Thymosin beta-4 is a major actin‑sequestering protein in eukaryotic cells. It binds to G‑actin (globular actin) and prevents its polymerization into F‑actin (filamentous actin), thereby regulating the cytoskeleton. This actin‑binding activity is central to:

• Cell shape changes and motility

• Wound healing and tissue repair

• Angiogenesis (new blood vessel formation)

• Inflammatory cell migration

TB-500 provides researchers with a stable, synthetic version of the active fragment of thymosin beta-4, allowing for focused study of its actin‑binding and cell‑motility properties without the complexity of the full‑length protein.

Third-Party Testing and Quality Assurance

Every batch of Premium TB-500 undergoes rigorous independent analytical testing to verify identity, purity, and consistency. This third-party testing ensures that researchers receive a product that meets strict quality specifications before it is approved for release.

The testing process includes:

• Identity verification through mass spectrometry

• Purity analysis using high-performance liquid chromatography (HPLC)

• Batch-to-batch consistency checks

• Residual solvent analysis to confirm complete lyophilization

With a verified purity of ≥98% as confirmed by HPLC, TB-500 meets the high standards required for serious laboratory research applications. Each vial contains only the lyophilized research compound with no unnecessary additives, fillers, or excipients. Batch‑specific Certificates of Analysis (CoA) are available upon request.

Chemical and Physical Properties

Molecular Characteristics

TB-500 is a synthetic acetylated heptapeptide (7 amino acids) derived from the N‑terminal region of thymosin beta-4.

Detailed Molecular Information:

• Molecular Formula: C₂₁₂H₃₅₀N₅₆O₇₈S

• Molecular Mass: 4963.5 daltons

• CAS Number: 885340-08-9

• Sequence: Ac-LKKTETQ (acetylated leucine-lysine-lysine-threonine-glutamic acid-threonine-glutamine)

• Purity: ≥98% (HPLC)

• Appearance: White to off‑white lyophilized powder

Structural Features:

• Acetylated N-terminus for enhanced stability

• Contains two lysine residues (positive charges)

• Contains threonine and glutamic acid residues

• Water-soluble

Physical Form and Storage

The product is supplied as a lyophilized (freeze-dried) powder within a sterile, sealed vial. Lyophilization preserves the chemical integrity of the peptide by removing water content while maintaining the compound’s structure.

Recommended Storage Conditions:

• Store lyophilized powder at -20°C (-4°F) or below for long-term preservation

• Protect from light exposure

• Keep desiccated to prevent moisture absorption

• Allow vial to reach room temperature before opening to avoid condensation

• Avoid repeated freeze-thaw cycles once reconstituted

Stability Considerations:
TB-500 is generally stable when stored properly in lyophilized form. The acetylation of the N-terminus provides additional protection against enzymatic degradation compared to non‑acetylated peptides.

Once reconstituted with an appropriate sterile solvent, the solution should be used promptly according to laboratory protocols.

Intended Use and Regulatory Status

Research Use Only

TB-500 is classified as a research chemical and is intended exclusively for laboratory and in vitro experimentation. This designation means the product is sold strictly for:

• In vitro testing — experiments conducted in controlled laboratory environments

• Cell culture studies — investigating actin dynamics and cell migration

• Angiogenesis research — studying endothelial cell tube formation

• Wound healing models — scratch assays and cell motility

• Analytical research — chemical analysis and characterization studies

• Scientific investigation — basic research into thymosin beta-4 fragment biology

Important Regulatory Notice

This product is not a drug, food, cosmetic, or medical device. Bodily introduction of any kind into humans or animals is strictly forbidden by law. The product should only be handled by licensed, qualified professionals working in appropriate laboratory facilities.

The supplier is a chemical supplier, not a compounding pharmacy or outsourcing facility under Sections 503A or 503B of the Federal Food, Drug, and Cosmetic Act. All product information provided is for educational and research purposes only and does not constitute medical advice or clinical recommendations.

Handling and Safety Guidelines

Professional Handling Required

TB-500 should only be handled by trained laboratory personnel wearing appropriate personal protective equipment (PPE), including:

• Laboratory coat

• Nitrile gloves

• Safety goggles or face shield

• Appropriate respiratory protection if aerosolization is possible

Reconstitution Protocol

For laboratory use, the lyophilized powder should be reconstituted with a sterile, compatible solvent. Standard practice includes:

1. Allow the sealed vial to reach room temperature — approximately 15-30 minutes

2. Clean the rubber stopper with an alcohol swab

3. Add the calculated volume of solvent to achieve desired concentration

4. Gently swirl or roll the vial between palms — do not shake vigorously to avoid foaming

5. Allow complete dissolution before use — this typically takes 2-5 minutes

Reconstitution Example for TB-500 10MG:
For researchers needing a 5mg/mL working solution, add 2mL of sterile solvent to the 10mg vial. For a 10mg/mL solution, add 1mL of solvent. For a 2mg/mL solution, add 5mL of solvent. Always verify calculations before proceeding with experiments.

Solvent Considerations:
TB-500 is water-soluble. Researchers should determine the appropriate solvent based on their specific experimental protocol. Common options include sterile water for injection, bacteriostatic water, or buffered solutions such as phosphate-buffered saline (PBS) at neutral pH.

Disposal Considerations

Dispose of TB-500 and any contaminated materials in accordance with federal, state, and local regulations for chemical waste disposal. Do not dispose of in regular trash or down drains unless permitted by local guidelines.

Research Applications

TB-500 is used in various laboratory research contexts, primarily focused on actin biology, cell migration, and angiogenesis. Typical applications include:

Actin Binding and Cytoskeletal Studies:
The primary research interest in TB-500 revolves around its ability to bind G‑actin and regulate actin polymerization. Researchers use TB-500 to study:

• Actin sequestration and depolymerization mechanisms

• G‑actin/F‑actin dynamics

• Cytoskeletal reorganization during cell migration

• Structure‑activity relationships of thymosin beta-4 fragments

Endothelial Cell Migration and Angiogenesis Research:
TB-500 acts as a potent chemoattractant for endothelial cells. Research applications include:

• HUVEC migration assays

• Tube formation on Matrigel

• Vascular endothelial growth factor (VEGF) interactions

• Capillary formation and network organization

Wound Healing and Scratch Assays:
Researchers use TB-500 in controlled wound healing models to study:

• Scratch wound closure kinetics

• Keratinocyte and fibroblast migration

• Re‑epithelialization processes

• Growth factor expression during healing

Cell Culture Investigations:
TB-500 is used in cell culture systems to study:

• Endothelial cell proliferation and migration

• Fibroblast motility and contraction

• Inflammatory cell chemotaxis

• Cellular responses to thymosin beta-4 fragments

Actin-Based Motility Research:
The peptide serves as a tool for investigating:

• Lamellipodia and filopodia formation

• Cell spreading and adhesion

• Chemotactic gradient sensing

• Rho GTPase signaling pathways

Researchers should design their experimental protocols based on peer-reviewed literature and established laboratory practices specific to thymosin beta-4 fragments.

What Makes This Product Different

Bioactive Thymosin Beta-4 Fragment

TB-500 represents the minimal active sequence of thymosin beta-4 responsible for actin binding and cell migration. This focused fragment allows researchers to study these specific activities without the complexity of the full-length protein.

Acetylated for Enhanced Stability

The N‑terminal acetylation provides additional resistance to enzymatic degradation, making TB-500 more stable in laboratory settings than non‑acetylated versions.

Rigorous Quality Control

Unlike research chemicals sold without verification, TB-500 comes with documented third-party testing for every batch, including HPLC purity analysis and mass spectrometry identity confirmation. This commitment to quality assurance gives researchers confidence in the consistency and reliability of their experimental results.

Optimal 10MG Research Quantity

The 10mg vial size is ideal for:

• Cell migration assays and wound healing experiments

• Dose‑response studies across multiple concentrations

• Replicated experiments requiring consistent batch material

• Cost‑effective initial investigations

Batch Traceability

Each package of TB-500 includes batch identification numbers that allow researchers to trace their material back to original manufacturing and testing records. This traceability is essential for reproducible research and quality documentation.

Frequently Asked Questions for Researchers

What is the purity level of TB-500?

Each batch is tested to verify purity of ≥98% via HPLC, with identity confirmed by mass spectrometry. Individual certificates of analysis are available upon request.

What is the difference between TB-500 and thymosin beta-4?

TB-500 is a synthetic heptapeptide fragment (Ac‑LKKTETQ) corresponding to the active region of the full‑length 43‑amino acid thymosin beta-4 protein. It retains the actin‑binding and cell‑migration activities of the parent protein in a smaller, more stable format.

How should the lyophilized powder be stored?

Store at -20°C or below, protected from light and moisture. Avoid repeated freeze-thaw cycles once reconstituted.

What solvent should be used for reconstitution?

TB-500 is water-soluble. Researchers should determine the appropriate solvent based on their specific experimental protocol. Common options include sterile water for injection, bacteriostatic water, or buffered solutions such as PBS at neutral pH.

Is this product sterile?

The lyophilized powder is manufactured under aseptic conditions, but researchers should follow standard laboratory practices for handling research chemicals. For cell culture applications, additional filtration using a 0.22-micron filter may be appropriate.

What is the mechanism of action of TB-500?

TB-500 binds to G‑actin (globular actin) and sequesters it, preventing its polymerization into F‑actin. This activity regulates the cytoskeleton and promotes cell migration and tissue organization.

What research applications is TB-500 used for?

TB-500 is studied in actin dynamics, endothelial cell migration, angiogenesis, wound healing, and cell motility research in laboratory cell culture and research models.

Can TB-500 be used in combination with other research peptides?

Researchers should determine compatibility based on their specific experimental design. Standard laboratory practice includes testing interactions in control experiments before full-scale implementation.

Final Notes for Laboratory Researchers

Premium TB-500 represents a high-purity research tool for qualified professionals conducting legitimate scientific investigations into actin biology, cell migration, angiogenesis, and related fields. With documented third-party testing, complete chemical specifications, and appropriate packaging for laboratory use, this product meets the standards expected by serious researchers.

The 10mg vial size is specifically optimized for cell culture experiments, migration assays, and wound healing studies requiring precise handling. As a synthetic fragment of thymosin beta-4 with well‑characterized actin‑binding properties, TB-500 offers unique research opportunities in cytoskeletal dynamics and tissue remodeling.

For research use only. Not for human or animal consumption. Handle only in appropriate laboratory facilities with proper safety equipment and training.