Cardiac myosin is a protein found in the muscles of the heart, specifically in the cardiac muscle cells. It plays a crucial role in regulating the contraction and relaxation of the heart muscle, which is essential for maintaining proper heart function. Research in the field of cardiac myosin aims to understand how this protein functions, how it is regulated, and how mutations or abnormalities in myosin can lead to various cardiac diseases and conditions. By studying cardiac myosin, researchers hope to develop new treatments and therapies for heart-related disorders.