The thick protein filaments in a cell are primarily made of a protein called myosin. Myosin filaments are involved in muscle contraction and various other cellular processes such as cell motility and cytokinesis.
The filament in a bacterial flagellum is made of a protein called flagellin. Flagellin forms the helical structure of the flagellum filament, providing the bacterium with motility.
In essence, a protein filament is a long strand (aka filament) that's made of protein (hence, "protein filament"). So they are composed of smaller, protein subunits, which are single protein molecules.
The three different types of myofilaments are thick filaments, thin filaments, and elastic filaments. Thick filaments are composed of myosin protein, thin filaments are primarily made of actin protein, and elastic filaments (also known as titin) provide elasticity and stability to the sarcomere.
The thick filaments (made of myosin) do not change length during shortening of the sarcomere. They slide past the thin filaments (made of actin) to generate muscle contraction.
The two filaments involved are myosin and actin. Actin: is the framework and slides over the myosin filament when the muscle is shortened. myosin: is a thick filament Also a sacromere: is made up of the actin and myosin. It is the functional unit of a muscle fibre and extends from z line to z line. A muscle contraction: is many sacromeres shortening ( actin sliding over myosin)
A muscle is made of many cylindrical muscle fibers. The many fibers are bound together with connective tissue. Nerves and blood vessels (arteries and veins) run along the connective tissue.In every muscle fiber, there are thick filaments, made of the protein myosin, and thin filaments, made of the protein actin. The filaments overlap to form the sarcomere, a part of the muscle. Myosin has little heads that attach to actin, and pull on it. This is when the sarcomere contracts, and when all of the sarcomeres of a muscle contract, the entire muscle contracts.
A muscle is made of many cylindrical muscle fibers. The many fibers are bound together with connective tissue. Nerves and blood vessels (arteries and veins) run along the connective tissue.In every muscle fiber, there are thick filaments, made of the protein myosin, and thin filaments, made of the protein actin. The filaments overlap to form the sarcomere, a part of the muscle. Myosin has little heads that attach to actin, and pull on it. This is when the sarcomere contracts, and when all of the sarcomeres of a muscle contract, the entire muscle contracts.
The specific function of the sarcomere H band within the structure of a muscle cell is to contain only thick filaments made of myosin, which are responsible for muscle contraction.
The sarcomere is the basic unit of muscle contraction, and it is made up of different bands. The structure of the sarcomere is directly related to the bands within it, specifically the A band, I band, and Z line. The A band contains thick filaments of myosin, the I band contains thin filaments of actin, and the Z line marks the boundaries of each sarcomere. The arrangement and overlap of these bands within the sarcomere allow for muscle contraction to occur efficiently.
Proteins in the sarcomere are organized into thick filaments made of myosin and thin filaments made of actin. These filaments overlap and slide past each other during muscle contraction. Other proteins like troponin and tropomyosin are also present to regulate the interaction between actin and myosin.
The bacterial flagellum is primarily composed of a filament, hook, and basal body. The filament is made up of protein subunits called flagellin, which form the helical structure. The hook acts as a flexible joint between the filament and the basal body, which anchors the flagellum to the cell membrane and provides the rotary motor for movement.