Decrease in magnetic anisotropy of external segments of the retinal rods after a total photolysis.

Biophysical journal ·Vol. 18 ·No. 1 ·1977-04-00 ·Pages 125-7

Chagneux R, Chagneux H, Chalazonitis N

Abstract

The magnetic anisotropy of a polymembrane cell, such as the external segment of the frog retinal rod, is defined as the difference between the axial magnetic susceptibility (chiar), chia - chir = deltachi of the segment. After the total photolysis of the rhodopsin in situ, deltachi decreases a significantly by 20%. This decrease in magnetic anisotrophy should involve a subtle molecular disorder, mostly due to an alteration of the rhodopsin molecule.

MeSH Terms

Animals Anura Dark Adaptation In Vitro Techniques Magnetics Photolysis Photoreceptor Cells/physiology Retinal Pigments/physiology Rhodopsin/physiology

Chemicals

Retinal Pigments Rhodopsin

Authors & Affiliations

3 authors, click to expand affiliations / ORCID

Chagneux R

Chagneux H

Chalazonitis N

References (6)

6 references, click to expand

Magnetic anisotropy and the orientation of retinal rods in a homogeneous magnetic field.
Proc Natl Acad Sci U S A. 1971 Jun;68(6):1283-5 PMID: 5288376
[Rotation of external segments of photoreceptors in constant magnetic field].
C R Acad Sci Hebd Seances Acad Sci D. 1970 Jul 6;271(1):130-3 PMID: 4988329
[Evaluation of magnetic anisotropy of multimembrane cells in a constant magnetic field (external segments of frog retina rods)].
C R Acad Sci Hebd Seances Acad Sci D. 1972 Jan 10;274(2):317-20 PMID: 4622084
[Annulation of the magnetic rotation of external segments of photoreceptors by carbon dioxide].
C R Acad Sci Hebd Seances Acad Sci D. 1972 Jul 17;275(3):487-9 PMID: 4628316
X-ray diffraction studies of retinal rods. II. Light effect on the osmotic properties.
Biochim Biophys Acta. 1975 Mar 25;382(3):336-43 PMID: 1079142
[Changes in the magnetic anisotropism of the external segments of rods during photolysis of rhodopsin].
C R Acad Sci Hebd Seances Acad Sci D. 1976 MAR 8;282(10):1049-52 PMID: 821633

Article Info

Journal

Biophysical journal

Abbr.

Biophys J

ISSN

0006-3495

DOI

10.1016/S0006-3495(77)85600-2

Published

1977-04-00

Pages

125-7

Language

English

Region

United States

NLM ID

0370626

PMCID

PMC1473267

Subset

External Links

PubMed source DOI: 10.1016/S0006-3495(77)85600-2 PMC Full Text View journal details

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Decrease in magnetic anisotropy of external segments of the retinal rods after a total photolysis.

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