‘Square arrays’ in the sarcolemma of human skeletal muscle fibres
- 1 September 1979
- journal article
- Published by Springer Nature in Nature
- Vol. 281 (5727), 145-146
- https://doi.org/10.1038/281145a0
Abstract
Fast twitch fibres of rat and rabbit show rectangular patterns of intramembrane particles in freeze-fracture preparations of the sarcolemma. These 'square arrays' are almost totally absent in the slow twitch coleus muscle of rat. I report here differences in the incidence of square arrays in human fetal and adult muscle and in different fibres within a human muscle. Square arrays probably classify fast and slow twitch fibres in freeze-fracture preparations of mixed muscles.Keywords
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