is actin in the sarcomere
Sarcomere. The sarcomere is the unit of the contractile system of muscles found in the myofibrils, and consists of actin and myosin arranged in transverse bands. From: Canine Rehabilitation and Physical Therapy (Second Edition), 2014. Related terms: Nucleus (neuroanatomy) Myosin; Myocyte; Troponin; Hypertrophy; Myopathy; T-tubule; Cardiac muscle cell; Skeletal muscle