Dyneins are a type of motor protein found in cells that play a crucial role in transporting cellular materials. They move along microtubules, which are part of the cell's cytoskeleton, carrying various cargoes such as organelles and vesicles. Dyneins typically transport these materials toward the cell's center, a process known as retrograde transport. These proteins are essential for many cellular functions, including cell division and the movement of cilia and flagella. Dyneins work in conjunction with another type of motor protein called kinesins, which move cargo in the opposite direction, toward the cell's periphery. Together, they help maintain cellular organization and function.