Dynein is a type of motor protein found in cells that plays a crucial role in transporting cellular materials. It moves along structures called microtubules, which are part of the cell's cytoskeleton. Dynein is essential for various cellular processes, including the movement of organelles, vesicles, and even chromosomes during cell division. There are two main types of dynein: cytoplasmic dynein, which is involved in transporting cargo within the cell, and axonemal dynein, which is important for the movement of cilia and flagella. Proper functioning of dynein is vital for maintaining cellular health and organization.