TB-500 for laboratory research
A trade name used for synthetic peptides related to thymosin beta-4. Exact sequence identity must be specified and verified for every batch.
Overview
"TB-500" is a trade name rather than a single defined chemical identity. It is used for synthetic peptides related to thymosin beta-4 (Tβ4), a naturally occurring 43-amino-acid protein. Depending on the source, material sold under this name may be described as full-length Tβ4 or as a shorter fragment, such as the actin-binding region (LKKTETQ).
Because the name alone does not establish what is in the vial, NEXA requires the exact sequence, length and any terminal modifications to be agreed in writing, and matched to the batch Certificate of Analysis, before any supply is considered.
Reference identity data
| Common name | TB-500 (trade name) |
|---|---|
| Related protein | Thymosin beta-4 (Tβ4), 43 amino acids |
| Sequence | Must be specified per request and confirmed on the batch COA |
| Terminal modifications | To be specified (for example N-terminal acetylation) |
| Molecular weight | Depends on the specified sequence |
| Typical form | Lyophilised powder (to be confirmed per batch) |
When you request TB-500, state the exact sequence you require in the specification field. Requests without a defined identity will be asked for clarification before quotation.
Documentation available on request
- Batch-specific Certificate of Analysis, including the testing method, date and issuing laboratory
- HPLC purity with chromatogram, and mass spectrometry identity with observed and theoretical mass
- Net peptide content and salt form, where determined
- Batch number traceable to the vial label and invoice
No purity, testing or stock claim is published without supporting records. Read our guide on how to read a peptide Certificate of Analysis.
Regulatory status and eligibility
Thymosin beta-4 related peptides are not authorised medicines in most jurisdictions. Their status for laboratory supply and import varies by country, and destination rules are reviewed before any supply is considered.
Requests must come from a laboratory or research organisation and describe a legitimate non-clinical research purpose. Personal-use requests are declined. Import requirements in the destination country are the customer's responsibility.
Handling
For storage and handling of lyophilised material in the laboratory, see storing and handling lyophilised peptides.