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

Most people picture molecules as rigid, locked-together structures — like tiny pieces of stone. But the molecules inside every living cell are something far more remarkable: they hold together loosely and temporarily on purpose. The strongest molecular bonds—called covalent bonds—share electrons so firmly that breaking them requires a serious chemical event. These strong bonds produce the stable structures of large molecules like DNA, RNA, lipids, and proteins. When the DNA/R