Degradation of junctional and extrajunctional acetylcholine receptors by developing rat skeletal muscle

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Abstract

We have examined the rate of degradation of the total acetylcholine receptor content of diaphragm muscles of young rats and have found that even in muscles from 1-day-old rats some receptors are metabolically more stable than adult extrajunctional receptors. Further experiments have shown that acetylcholine receptors at junctional regions from young rats are degraded slowly, whereas those in extrajunctional regions are degraded rapidly. The results demonstrate that junctional acetylcholine receptors in rat diaphragm are degraded at a slow rate characteristic of adult junctional receptors at all ages after birth.

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Steinbach, J. H., Merlie, J., Heinemann, S., & Bloch, R. (1979). Degradation of junctional and extrajunctional acetylcholine receptors by developing rat skeletal muscle. Proceedings of the National Academy of Sciences of the United States of America, 76(7), 3547–3551. https://doi.org/10.1073/pnas.76.7.3547

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