The eukaryotes seem to contain a major amount of motor proteins. These motor proteins are found to be in great coordination with the actin filaments. They are known as the Myosin. Myosin can be subdivided as Myosin 1 and Myosin 2. Myosin 1 possesses the contractile property like the actins and hence helps in muscle contraction.
Stress fractures can be described as a very small sliver or crack in the bone; and are sometimes referred to as hairline fractures. Stress fractures most frequently occur in weight-bearing bones, such as the tibia (bone of the lower leg), metatarsals, and navicular bones (bones of the foot).Less common are fractures to the femur, pelvis, and sacrum.tress fractures can be described as a very small sliver or crack in the bone; and are sometimes referred to as hairline fractures. Stress fractures most frequently occur in weight-bearing bones, such as the tibia (bone of the lower leg), metatarsals, and navicular bones (bones of the foot).
Factors that can increase your risk of stress fractures include: 1  Certain sports. Stress fractures are more common in people who participate in sports such as track and field, basketball, tennis, dance or gymnastics. 2  Increased activity.