Dyneins are a type of motor protein found in cells that play a crucial role in transporting various cellular components. They move along structures called microtubules, which are part of the cell's cytoskeleton. Dyneins are essential for processes like cell division and the movement of cilia and flagella, which help cells swim or move fluids. These proteins work by converting chemical energy from ATP into mechanical work, allowing them to "walk" along microtubules. Dyneins typically transport materials toward the cell's center, a process known as retrograde transport. Their function is vital for maintaining cellular organization and communication.