TB-500 10 MG Beta 4

TB-500 is the synthetic fragment of thymosin beta-4 encompassing its central actin-binding domain — the region of the 43-amino-acid parent protein most directly implicated in cytoskeletal regulation. In cell biology, thymosin beta-4 functions as a G-actin sequestering protein, controlling the availability of actin monomers for filament assembly; TB-500 is studied as the minimal sequence retaining this regulatory activity. Preclinical literature has examined it in models of cell migration, wound closure, and tissue remodeling, where actin dynamics are the rate-limiting step. Because the fragment is far simpler to synthesize and characterize than the full-length protein, it became the workhorse reagent for thymosin-pathway research, while the intact protein is reserved for studies requiring the complete molecule. Laboratories use TB-500 in scratch-wound assays, endothelial migration models, and comparative studies against full-length thymosin beta-4. Scratch-wound and endothelial-migration assays are the standard in vitro models in which the fragment's activity is characterized. For laboratory research use only. Not for human or veterinary use.