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. 1974 Apr;61(1):156-65.
doi: 10.1083/jcb.61.1.156.

Association of calcium with membranes of squid giant axon: ultrastructure and microprobe analysis

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

Association of calcium with membranes of squid giant axon: ultrastructure and microprobe analysis

J L Oschman et al. J Cell Biol. 1974 Apr.

Abstract

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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