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Myosin

A myosin molecule has a long tail and a hinged globular head which allows the head to move back and forwards and bend. The head has binding sites for ATP and actin. The tails align in parallel to form a myosin filament.The myosin tails point towards the centre of the sarcomere, whilst the heads point towards the Z-lines.

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Specification: AQA Biology (7402), A-level, 3.6.3 Skeletal muscles are stimulated to contract by nerves and act as. Topic: Muscles.

Key terms in this lesson

ATP synthase
An enzyme that spans a membrane and synthesises ATP from ADP and inorganic phosphate as protons flow through it down their concentration gradient.
ATP
Adenosine triphosphate, the universal energy currency of cells, formed by adding an inorganic phosphate to ADP and hydrolysed to release energy for cellular reactions.

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