ASSOCIATION OF CALCIUM WITH MEMBRANES OF SQUID GIANT AXON Ultrastructure and Microprobe Analysis

Oschman , J. L.; Hall , T. A.; Peters , P. D.; Wall , B. J.

doi:10.1083/jcb.61.1.156

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Article| April 01 1974

ASSOCIATION OF CALCIUM WITH MEMBRANES OF SQUID GIANT AXON : Ultrastructure and Microprobe Analysis

J. L. Oschman,

J. L. Oschman

From the Cavendish Laboratory and Department of Zoology, Cambridge, England, and the Marine Biological Laboratory, Woods Hole, Massachusetts 02543.

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T. A. Hall,

T. A. Hall

From the Cavendish Laboratory and Department of Zoology, Cambridge, England, and the Marine Biological Laboratory, Woods Hole, Massachusetts 02543.

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P. D. Peters,

P. D. Peters

From the Cavendish Laboratory and Department of Zoology, Cambridge, England, and the Marine Biological Laboratory, Woods Hole, Massachusetts 02543.

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B. J. Wall

From the Cavendish Laboratory and Department of Zoology, Cambridge, England, and the Marine Biological Laboratory, Woods Hole, Massachusetts 02543.

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Author and Article Information

J. L. Oschman

From the Cavendish Laboratory and Department of Zoology, Cambridge, England, and the Marine Biological Laboratory, Woods Hole, Massachusetts 02543.

T. A. Hall

From the Cavendish Laboratory and Department of Zoology, Cambridge, England, and the Marine Biological Laboratory, Woods Hole, Massachusetts 02543.

P. D. Peters

From the Cavendish Laboratory and Department of Zoology, Cambridge, England, and the Marine Biological Laboratory, Woods Hole, Massachusetts 02543.

B. J. Wall

From the Cavendish Laboratory and Department of Zoology, Cambridge, England, and the Marine Biological Laboratory, Woods Hole, Massachusetts 02543.

The present address of Dr. Oschman and Dr. Wall is Department of Biological Sciences, Northwestern University, Evanston, Illinois 60201.

Received: July 27 1973

Revision Received: October 16 1973

Online ISSN: 1540-8140

Print ISSN: 0021-9525

1974

J Cell Biol (1974) 61 (1): 156–165.

https://doi.org/10.1083/jcb.61.1.156

Giant axons from the squid, Loligo pealei, were fixed in glutaraldehyde and postfixed in osmium tetroxide. Calcium chloride (5 mM/liter) was added to all aqueous solutions used for tissue processing. Electron-opaque deposits were found along the axonal plasma membranes, within mitochondria, and along the basal plasma membranes of Schwann cells. X-ray microprobe analysis (EMMA-4) yielded signals for calcium and phosphorus when deposits were probed, whereas these elements were not detected in the axoplasm.

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