Spin-Labeled Neurospora Mitochondria

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Spin-label studies were carried out on Neurospora mitochondria under in vivo and in vitro labeling conditions. A long-chained spin-labeled fatty acid was incorporated by Neurospora and was found in mitochondrial phospholipids. The molecular motion at various temperatures was different from that for the same spin label under in vitro labeling conditions. The results for spin-labeled mitochondria were compared with those from isolated lipids and with those from aggregates of spin-labeled fatty acid and isolated bovine serum albumin. These comparisons suggest that the hydrocarbon portions of membranes are relatively fluid and are not extensively restricted in motion by association with proteins. © 1970, The Biophysical Society. All rights reserved.




Keith, A., Bulfield, G., & Snipes, W. (1970). Spin-Labeled Neurospora Mitochondria. Biophysical Journal, 10(7), 618–629. https://doi.org/10.1016/S0006-3495(70)86324-X

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