Meet Actin!

There is more actin in an animal or plant cell than any other protein. This is because actin is an important component of the cell's cytoskeleton. Individual actin proteins string together to form actin filaments, sometimes called microfilaments. Much like your skeleton does for you, actin filaments in the cytoskeleton help the cell keep its …

Meet Myosin II!

Myosin II is a motor protein, which means it converts chemical energy into a mechanical response. Myosin II is a member of the myosin superfamily, and like its relatives, myosin II "walks" along tracks made of actin (learn about actin here). Myosin walks on actin. Myosin II is categorized as a muscle myosin because it …