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TB-500 Peptide: Thymosin β4 Fragment Research Profile

June 3, 2026

TB-500 Peptide: Thymosin β4 Fragment Research Profile

TB-500 is the widely-studied active fragment of thymosin β4, an actin-sequestering peptide central to cytoskeletal and tissue-research literature.

TB-500 corresponds to the bioactive fragment of thymosin β4 (Tβ4), a 43-residue actin-sequestering peptide. Published in-vitro literature describes G-actin binding, cytoskeletal reorganisation and angiogenesis-relevant signalling.

Research characteristics

  • Actin binding via the LKKTETQ motif.
  • Upregulation of VEGF and PGE2 pathways in cultured cell studies.
  • Widely referenced in tissue-model repair literature.
  • Batch identifier and synthesis date traceable to the lot record
  • HPLC purity ≥98% (typically ≥99% for peptides under 30 residues)
  • LC-MS confirmed monoisotopic or average mass within ±0.5 Da of theoretical
  • Counterion identity and content (acetate or trifluoroacetate) reported
  • Bacterial endotoxin and residual solvents per the analytical method
Research use only. All information on this page is provided strictly for in-vitro and laboratory research reference. Nothing in this article is medical, therapeutic, dosing, or performance advice for human or veterinary use.

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