TB-500 (Thymosin Beta-4) is a 43-amino-acid research peptide with a molecular weight of 889 g/mol. This guide covers its structure, supply form, and laboratory handling.
TB-500: Quick facts
| Full name | Thymosin Beta-4 (synthetic analogue) |
| Amino acids | 43 |
| Molecular formula | C₃₈H₆₈N₁₀O₁₄ |
| Molecular weight | 889.01 g/mol |
| Supply form | Lyophilised powder |
| Intended use | Scientific research only |
What is TB-500?
TB-500 is a synthetic version of Thymosin Beta-4, a naturally occurring peptide found in most human and animal tissues. It is a 43-amino-acid sequence that has been the subject of considerable scientific study due to its structural role in actin-binding and its presence in a wide variety of biological systems.
At My UK Peptides, TB-500 is supplied as a lyophilised powder for research use only. It is not intended for human or veterinary use, and should be handled exclusively in a properly equipped laboratory setting.
Molecular structure and properties
TB-500 belongs to a family of actin-sequestering proteins. Its molecular structure features a central LKKTET motif — a short sequence that is thought to play a central role in actin binding. The peptide is hydrophilic and soluble in aqueous solutions, making reconstitution in bacteriostatic water straightforward for most research applications.
Supply form and storage
TB-500 arrives lyophilised in sealed glass vials. This freeze-dried form is stable at room temperature for short periods during transit, but should be stored at −20°C on receipt for any storage longer than one week. Once reconstituted, keep the solution refrigerated at 2–8°C and use within 28 days. Do not freeze reconstituted solutions.
Reconstitution
Reconstitute using bacteriostatic water. For a 5 mg vial, adding 2 ml of bacteriostatic water gives a concentration of 2.5 mg/ml (2,500 mcg/ml). Each 0.1 ml drawn equates to 250 mcg. Always add the solvent slowly to the vial wall to prevent denaturation.
Important: TB-500 from My UK Peptides is a research compound only. It is not for human or animal use. For research use only in accordance with applicable regulations.