Scientists have produced the first high-resolution 3D image of the sarcomere, the basic contractile unit of skeletal and heart muscle cells, using electron cryo-tomography (cryo-ET). The international ...

Proceedings of the Pennsylvania Academy of Science, Vol. 41 (1967), pp. 10-15 (6 pages) Using a fresh unfixed muscle preparation and phase contrast microscopy, the entire sequence of morphological ...

The human heart, often described as the body's engine, is a remarkable organ that tirelessly beats to keep us alive. At the core of this vital organ, intricate processes occur when it contracts, where ...

Sarcomeres are small repeating subunits of myofibrils, the long cylinders that bundle together to make the muscle fibres. Inside the sarcomeres, filaments of the proteins myosin and actin interact to ...

In a decades-long effort, researchers have discovered how to tweak the molecular pathways that turn heart muscle motors up or down ...

This is a preview. Log in through your library . Abstract Each muscle cell of the syllid (Annelida: Polychaeta) proventriculus, the region of the gut posterior to the pharynx, contains a single ...

The basic functional unit of a muscle, known as the sarcomere, consists of actin, myosin and tropomyosin proteins. If a muscle is to be able to contract, the myosin must slide along filamentous actin ...

Atrial fibrillation, heart failure and stroke – hypertrophic cardiomyopathy can lead to many serious health conditions and is a major cause of sudden cardiac death in people younger than 35. „The ...