Thymosin 4 is a 43-amino-acid, roughly 5 kDa polypeptide. TB-500, as supplied by most research vendors, is a short synthetic fragment corresponding to the actin-binding motif within that larger sequence the region shown to carry much of the peptide's angiogenic activity in endothelial migration assays. The distinction matters when you calculate on a molar rather than a mass basis
Chien PFW, Smith K, Peter WW, Scrimgeour CM, Talor DJ, Rennie MJ: Protein turnover in the human fetus studied a term using stable isotope tracer amino acids
FLT3 ligand stimulates proliferation and inhibits apoptosis of acute myeloid leukemia blasts
This fluorescence-based technique requires low protein concentrations and offers high sensitivity, well-suited for studying concentration-dependent aggregation-prone IDPs like Syn
10.1111/j.1469-7580.2009.01199.x 55 KangE
doi: 10.1210/er.2017-00073 19 MassiminoMSciaccaLParrinelloN