Buy TB-500 UK research peptide from Peptides Lab UK. TB-500 is a synthetic version of a 17-amino-acid fragment of thymosin beta-4 (TB4), one of the most-studied actin-sequestering proteins in cell-biology research. It is widely used as a reference compound in pre-clinical studies on cytoskeletal dynamics and tissue-repair signalling models. Supplied as a lyophilised powder in a sealed laboratory vial, third-party HPLC-tested to greater than 99% purity, with a batch-specific Certificate of Analysis available on request. UK orders placed before 3pm dispatch the same working day in plain packaging. For laboratory and in vitro research use only. Not for human consumption. Not a medicine.