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Biophysical Journal 47: 431-436 (1985)
© 1985 the Biophysical Society

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Quantitative characterization of a biological membrane by means of its spatial autocovariance.

G Rasigni, J Palmari, M Rasigni, F Varnier, J P Palmari, F Marty and A Llebaria

ABSTRACT

Profiles for the exoplasmic face (EF) of the freeze-fractured plasma membrane from the root storage tissue of red beets are reconstructed by microdensitometry of micrographs of surface-shadowed-platinum carbon replicas. Autocovariance functions (ACFs) are computed from those profiles. The initial portions of the ACFs have a Gaussian form whose parameters (root mean square surface roughness and autocovariance length) are estimated. The parameter estimates are used to show that the pits on the EF faces are in good complementarity with the intramembrane particles seen on the complementary protoplasmic fracture faces.






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Copyright © 1985 by the Biophysical Society.