Mutation Provides Superior Resilience to Cold

Mutation Provides Superior Resilience to Cold
(AP Photo/Evgeniy Sofiychuk)

Almost one in five people lacks the protein α-actinin-3 in their muscle fibre. Researchers at Karolinska Institutet now show that more of the skeletal muscle of these individuals comprises slow-twitch muscle fibres, which are more durable and energy-efficient and provide better tolerance to low temperatures than fast-twitch muscle fibres.

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