Calcium in the developing skeletal muscles of the chick embryo

Calcium in the developing skeletal muscles of the chick embryo

The osmium-pyroantimonate technique was used for the ultrastructural study of Ca2+-localization in two types of chick embryo skeletal muscles: m. pectoralis and m. soleus. In 8- and 12-day old embryos the pyroantimonate precipitate was found on plasmalemma, condensed chromatine and ribosomes and in...

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Bibliographic Details
Published in:T͡S︡itologii͡a Vol. 24; no. 7; p. 744
Main Authors: Samosudova, N V, Enenko, S O, Larin, Iu S, Shungskaia, V E
Format: Journal Article
Language:Russian
Published: Russia (Federation) 01-07-1982
Subjects:
Animals
Calcium - metabolism
Chick Embryo
Cytological Techniques
Glycogen - metabolism
Microscopy, Electron
Muscles - embryology
Muscles - metabolism
Muscles - ultrastructure
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Summary:The osmium-pyroantimonate technique was used for the ultrastructural study of Ca2+-localization in two types of chick embryo skeletal muscles: m. pectoralis and m. soleus. In 8- and 12-day old embryos the pyroantimonate precipitate was found on plasmalemma, condensed chromatine and ribosomes and in N-lines of I-band. During myogenesis (15-, 21-day old embryos) the calcium precipitate is redistributed from the above mentioned sites to terminal cisternae and N-line of I-band. It is proposed that calcium of N-lines may be involved in the glycogenolysis, its association with the muscle contraction occurring particularly at early developmental stages.
ISSN:0041-3771