May have a role in cell motility. It has high affinity for both G-actin and F-actin. Binds to vesicle membranes via mannose residues and, by way of its interaction with actin, links these membranes to the cytoskeleton. Homodimer in solution. Primarily on Golgi and vesicle membranes. Levels of p24 mRNA increase rapidly during early development and then drop sharply after aggregation. The N-terminus is blocked.