What is TB-500?

TB-500 is a synthetic peptide fragment corresponding to the active region of thymosin beta-4, a naturally occurring protein involved in actin regulation within cells. It belongs to the actin-binding peptide research class, and laboratory interest centers on how it influences cell migration and cytoskeletal dynamics in tissue models. Because it is a fragment rather than the full-length protein, researchers use it to isolate which portion of thymosin beta-4’s activity is responsible for effects observed with the complete molecule. It is commonly referenced in cell-motility and tissue-recovery pathway studies alongside other actin-regulating research peptides. Thymosin beta-4’s full-length protein is present across a wide range of cell and tissue types, so researchers working with the TB-500 fragment often pair it with full-length protein controls to distinguish fragment-specific activity from effects attributable to the complete molecule. Full-length thymosin beta-4 was first characterized decades before the fragment now sold as TB-500 became a distinct research reagent in its own right.

TB-500 research in the UAE & GCC

Because TB-500 is a fragment rather than a whole protein, customs and courier paperwork that simply says “peptide” without specifying the fragment’s identity can slow clearance for researchers who buy TB-500 in the UAE; we itemize fragment identity on shipping documentation into Dubai, Abu Dhabi, Riyadh, Doha, and Kuwait City to avoid that ambiguity. Tracking runs door to door across all five for chain-of-custody logging on arrival.

Quality & verification

Native thymosin beta-4 is N-acetylated at its terminus, so confirming that the TB-500 fragment carries the correct terminal modification — not just the correct amino-acid sequence — is a meaningful part of identity verification, distinct from the purity percentage alone. As a larger fragment than most tissue-recovery peptides in this catalogue, it is also more prone to aggregation in concentrated solution, so the certificate of analysis reports the terminal-modification check alongside standard HPLC and mass-spectrometry purity. Powder is stable frozen and dark; reconstituted solution should be kept dilute and refrigerated rather than concentrated and held at room temperature.

Related peptides

TB-500 is often studied alongside BPC-157 and GHK-Cu in tissue-recovery pathway comparisons, since all three are referenced for distinct but complementary mechanisms, and comparative panels combining all three are common in laboratories mapping the broader tissue-remodeling cascade. See the Tissue & Recovery Peptides overview for the full set.

For laboratory research use only. Not for human or veterinary use, diagnosis, or treatment.