Research Comparison
TB-500 vs Wolverine Stack
A side-by-side research comparison of TB-500 and Wolverine Stack drawn from DRPSHP' peptide database records.
TB-500
Residues 17 to 23 of thymosin beta-4, a 43-residue protein that binds actin, are reproduced by TB-500 as the seven-residue chain Ac-LKKTETQ. The copied stretch lies in the middle of the parent's actin-binding region. Since that position is internal in the real protein, the acetyl cap at the front end is an addition made in synthesis. Care is needed with the name, because it is sometimes attached to full-length thymosin beta-4 even though the two differ in size (roughly 0.9 kDa against 5 kDa) and in the portions of the protein they contain. The bulk of the literature is on the whole protein, in cell culture and rodent models of skin, heart and corneal injury, whereas studies of the fragment by itself are far fewer and cannot be taken to show the same behaviour.
Wolverine Stack
Rather than a new molecule, Wolverine is two existing peptides, BPC-157 and TB-500, put together in one preparation. BPC-157 has fifteen residues and, according to those who first described it, comes from a sequence in a protein of gastric juice; almost all work on it is in rodents, a good part from one laboratory, and little exists in humans. TB-500 is the synthetic seven-residue chain Ac-LKKTETQ taken from thymosin beta-4, and much of the related research deals with the whole 43-residue protein, not the piece. As far as we know nobody has published a study of the two used together, so the combination has no literature to call its own.
Reading a comparison
A comparison places two records side by side; it does not merge them. Each description above is drawn from that compound's own record, and the two were not necessarily characterised by the same methods, at the same time, or to the same level of detail. Before comparing any attribute, it is worth establishing that both records describe the substance you think they describe — names are not identifiers, and two entries sharing a name can differ in salt form, stereochemistry or the convention used to state a mass. Where a figure carries no method beside it, the comparison is between two reported numbers rather than between two measurements.