M1636
Myosin, Calcium activated from rabbit muscle
buffered aqueous glycerol solution, 0.5-1.5 units/mg protein (biuret)
Sinonimo/i:
Myosin adenosinetriphosphatase
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About This Item
Prodotti consigliati
Origine biologica
rabbit muscle
Forma fisica
buffered aqueous glycerol solution
Attività specifica
0.5-1.5 units/mg protein (biuret)
PM
heavy chain ~200 kDa (each)
light chain 15-20 kDa (each)
~480 kDa
tecniche
ELISA: suitable
Condizioni di spedizione
wet ice
Temperatura di conservazione
−20°C
Azioni biochim/fisiol
Myosin interacts with actin in muscle and non-muscle cells. Myosin molecules consist of two major regions: tails (rods) and heads. They aggregate into filaments through the tail region and interact with actin and with ATP through the head region. Myosin molecules spontaneously assemble into filaments in solutions of physiologic ionic strength and pH. Thick filament consists mainly of myosin molecules. Myosin is activated by the enzyme ATPase. This activation is the immediate source of the free energy that drives muscle contraction. It binds to the polymerized form of actin, the major constituent of the thin filament. Multiple forms of myosin heavy chains exist for each muscle type-skeletal, cardiac, smooth and non-muscle isomyosin forms exist in different types of skeletal muscle, depending on the physiological function of the muscle. These are designated as type I (slow-twitch) and type II (fast-twitch). Myosin is one of three classes of cytoskeletal motor proteins that have been identified. The others are kinesins and dyneins. These three types of proteins are thought to be responsible for the many movements that occur in cells. Myosin has been shown to be involved in neurosensory function, vesicle trafficking, determinant partitioning, and cortical function.
Myosin interacts with actin in muscle and non-muscle cells. Myosin is one of three classes of cytoskeletal motor proteins that have been identified. The others are kinesins and dyneins. These three types of proteins are thought to be responsible for the many movements that occur in cells. Myosin has been shown to be involved in neurosensory function, vesicle trafficking, determinant partitioning, and cortical function.
Definizione di unità
One unit will liberate 1.0 μmole of inorganic phosphorus from ATP per min at pH 9.0 at 25 °C in the presence of calcium.
Stato fisico
Solution in 50% glycerol containing 0.6 M potassium chloride and 10 mM potassium phosphate buffer, pH 6.8. Note: Solution may be hazy.
Codice della classe di stoccaggio
10 - Combustible liquids
Classe di pericolosità dell'acqua (WGK)
WGK 3
Punto d’infiammabilità (°F)
Not applicable
Punto d’infiammabilità (°C)
Not applicable
Dispositivi di protezione individuale
Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)
Certificati d'analisi (COA)
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Articoli
Myosins are a family of ATP-dependent motor proteins. Myosin II is the major contractile protein involved in eukaryotic muscle contraction by “walking” along actin microfilaments of the sarcomere
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