Sarcomere (IMAGE) Max-Planck-Gesellschaft Caption This is a schematic representation of the sarcomere. The z line is depicted in black, myosin in green/gray, actin in red and tropomyosin in blue. Credit MPI of Molecular Plant Physiology Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.