Dynein is a vastly more complex motor than kinesin. It walks along microtubules carrying vesicles, RNA granules, mitochondria, signaling complexes, and even large full chromosomes. It moves the entire cell nucleus during immune cell movement and manages the extraordinarily complex choreography of chromosome separation during cell division. It is a motor with awareness of what each situation requires. Dynein is enormous. Including its essential additional dynactin complex, i

Kinesin is an individual cellular motor made of just four protein chains that senses, navigates, makes decisions, and walks with two feet, step by step like a human. It picks up a variety of cargo, such as vesicles, mitochondria, molecular complexes, or messenger RNA and walks, one deliberate step at a time, along a highway of protein cables toward a precise destination. Walking upright on two legs is rare in nature—humans, ostriches, penguins, kangaroos, and a few others—e