Localization of calcium in an annelid visceral muscle by pyroantimonate deposition and by x-ray microprobe analysis.

Abstract:

:The loci of calcium distribution in Nereis pharyngeal visceral muscle have been examined by cytochemical precipitation using potassium pyroantimonate. In Na-, Ca- and Mg-free media, pyroantimonate incubation was used to pinpoint loci of intracellularly bound calcium. This method also revealed heavy deposition on the inner face of the plasma membrane, in the sarcoplasmic reticulum and nucleus. X-ray microprobe analysis of the precipitate confirmed the presence of calcium and antimony peaks. It is concluded that the plasma membrane may constitute a major calcium pool for the activation of contraction in this muscle.

journal_name

Tissue Cell

journal_title

Tissue & cell

authors

Alohan FI,Huddart H

doi

10.1016/0040-8166(81)90024-0

subject

Has Abstract

pub_date

1981-01-01 00:00:00

pages

525-34

issue

3

eissn

0040-8166

issn

1532-3072

pii

0040-8166(81)90024-0

journal_volume

13

pub_type

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