Principle 1: Molecules move through random collisions

Molecules move around through collisions resulting in random Brownian motion. In this example, in Treatment A, an Arp2/3 complex moves smoothly and linearly before binding to an actin filament, whereas in Treatment B, the motion is complex and chaotic.

To use this concept, consider depicting random walks.

Treatment A does not adhere to this principle, whereas Treatment B does.

Treatment A

Treatment B