HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Nemeth, P Articles by Pette, D Search for Related Content PubMed PubMed Citation Articles by Nemeth, P Articles by Pette, D

1. Succinate dehydrogenase (SDH) activity was assessed in situ in single fibres of cross-sectioned extensor hallucis longus, extensor digitorum longus, and soleus muscles of rat by means of microphotometric recordings of initial maximum reaction rates. 2. Each fibre assessed for SDH activity was subjectively classified into myosin subgroups by its histochemical reaction for myofibrillar actomyosin ATPase (myosin ATPase) following preincubation at pH 4.6 according to Brooke & Kaiser (1970). 3. The majority of fibres classified into myosin types I and IIa were highly reactive for SDH, such that those myosin groups could be interchangeable with the metabolic subgroups of Peter, Barnard, Edgerton, Gillespie & Stempel (1972); myosin I = slow-twitch oxidative, myosin IIa = fast-twitch oxidative glycolytic. 4. The myosin type IIb fibres, however, demonstrated marked variability in activity levels of SDH. Over 40% of those fibres had high SDH activity, and thus could not be equated with the metabolic subgroup fast-twitch glycolytic. 5. The histochemical reaction for myosin ATPase in muscle fibres therefore cannot be used as a reliable means to predict the fibres' metabolic characteristics.

This article has been cited by other articles:

				C. van der Poel, J. N. Edwards, W. A. Macdonald, and D. G. Stephenson Mitochondrial superoxide production in skeletal muscle fibers of the rat and decreased fiber excitability Am J Physiol Cell Physiol, April 1, 2007; 292(4): C1353 - C1360. [Abstract] [Full Text] [PDF]

				T. R. Koves, R. C. Noland, A. L. Bates, S. T. Henes, D. M. Muoio, and R. N. Cortright Subsarcolemmal and intermyofibrillar mitochondria play distinct roles in regulating skeletal muscle fatty acid metabolism Am J Physiol Cell Physiol, May 1, 2005; 288(5): C1074 - C1082. [Abstract] [Full Text] [PDF]

				M. R. Deschenes, J. A. Giles, R. W. McCoy, J. S. Volek, A. L. Gomez, and W. J. Kraemer Neural factors account for strength decrements observed after short-term muscle unloading Am J Physiol Regulatory Integrative Comp Physiol, February 1, 2002; 282(2): R578 - R583. [Abstract] [Full Text] [PDF]