Researchers from the University of Pittsburgh and the University of Chicago were able to control heart muscle function in a new way after discovering the previously unknown role of two enzymes in ...

The sliding filament model underlies all types of muscle contractions. Here are the three main types: Concentric Contraction: ...

Calcium's Role in Unveiling the Active Sites: In a resting muscle, the myosin-binding sites on actin are blocked by a protein complex called tropomyosin. Tropomyosin is a long, rod-shaped molecule ...

Actomyosin is a protein complex composed of actin and myosin. It is found in muscle fibers where it plays a role in muscle contraction. Actin is one of the most abundant proteins in eukaryotes. It ...

Researchers at UT Southwestern Medical Center at Dallas are the first to use genetically engineered mice containing a fluorescent molecule to examine in real time the chemical reactions that result in ...

Muscles transfer force to bones through tendons. They move our bones and associated body parts by pulling on them – this process is called muscle contraction. However, muscle contraction cannot act to ...

Isotonic contractions – these occur when a muscle contracts and changes length and there are two types: Isotonic concentric contraction – this involves the muscle shortening. The origin and insertion ...