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Structural diversity in muscle fibres of chicken breast
Departments of Anatomy and Neurology, University of Umeå.
Departments of Anatomy and Neurology, University of Umeå.
Biophysics Section, Blackett Laboratory, Imperial College, London.
1988 (English)In: Cell and Tissue Research, ISSN 0302-766X, E-ISSN 1432-0878, Vol. 251, no 2, p. 281-289Article in journal (Refereed) Published
Abstract [en]

hicken breast muscle is usually considered to be a relatively homogeneous white muscle and has therefore been widely used for studies of muscle proteins. In a previous study, however, we have found different M-region structures in different fibres from this muscle. Because of this result, we have now carried out a combined histochemical and ultrastructural survey of this muscle. In particular, we have made use of large transverse cryo-sections that include most of the muscle cross-section. Although the white region is fairly homogeneous in fibre content according to normal histochemical criteria (mATPase), we have found that there is a gradation of fibre structure across the muscle. The bulk of the muscle stains conventionally for Type-II fibres according to mATPase tests (the "white" part) but, in the small "red" part of the muscle, there are also Type-I fibres together with the Type-II fibres. Superimposed on this division into Type-I and Type-II fibres are variations in fibre size, oxidative and glycolytic staining properties, and variations of Z-band width and M-band structure; there is no strict correlation among any of these parameters. The apparently uniform staining across most of the muscle when tested for myofibrillar ATPase may be a misleading indicator of fibre properties.

Place, publisher, year, edition, pages
1988. Vol. 251, no 2, p. 281-289
Identifiers
URN: urn:nbn:se:ltu:diva-9070DOI: 10.1007/BF00215835Local ID: 7a258de0-a774-11de-8293-000ea68e967bOAI: oai:DiVA.org:ltu-9070DiVA, id: diva2:982008
Note
Upprättat; 1988; 20090922 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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