What is the major feature that determines the “fast-twitch” vs “slow-twitch” property of different muscle fibre types? (Lecture: skeletal muscle, Chapter: fibre types)

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The type of actin and titin expressed.

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The properties of the muscle protein titin e.g. fast or slow titin.

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The amount of ATP available in the fibres.

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The rate at which myosin can hydrolyse  ATP.

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The density of calcium channels present in the sarcolemma.

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What is the major feature that determines the “fast-twitch” vs “slow-twitch” pro...

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