Cell-migration readouts, in plain lab language
A cell-migration assay measures how far, or how many, cells move across a defined surface in culture, which is not a measure of healing in a person.
Papers on actin-binding peptides, including thymosin beta-4 and short fragments built on the LKKTETQ motif, often use a scratch assay or a porous-membrane chamber. Cells are plated, a gap or a membrane is the obstacle, and the readout is how many cells cross, or how much of the gap closes, over a stated time. Some experiments add a pathway blocker to argue that the movement depends on a particular signal.
The result is a cell-culture observation under those conditions. Coating, serum, and cell type all change it. A positive well is a reason to read the figure legend. It is not a claim that a research compound repairs tissue outside the dish.
TB-500 notes on this site use "cell-migration models" in that narrow sense. The catalog name can refer to more than one sequence, so the lot document still decides what was in the vial.