TB-500 is a synthetic peptide derived from a naturally occurring region of thymosin beta-4, a molecule widely studied for its involvement in cellular structure and repair processes. In research settings, TB-500 has drawn attention for its interaction with actin, a key protein responsible for maintaining cell shape, movement, and intracellular transport. By influencing actin dynamics, TB-500 is frequently examined for its potential role in cell migration, tissue organization, and regenerative signaling pathways.