Inhibits neural Wiskott-Aldrich syndrome protein (N-WASP) by stabilizing the autoinhibited state of the protein. Blocks phosphatidylinositol 4,5-bisphosphate (PIP2)-stimulated actin assembly (IC50 ~ 2 μM) but does not directly inhibit actin polymerization
LSKL, Inhibitor of Thrombospondin (TSP-1) TFA, a tetrapeptide derived from latency-associated protein (LAP)-TGFβ, acts as a competitive antagonist of TGF-β1.