NDLI: Force and myosin content variation in isolated intact single muscle fibres from Rana temporaria

Content Provider	Springer Nature Link
Author	Buschman, H. P. J. van der Laarse, W. J. Stienen, G. J. M. Elzinga, G.
Copyright Year	1997
Abstract	We studied the relation between force normalized by dry mass per unit length and the myosin fraction of muscle dry mass. The two tibialis anterior muscles were dissected from 12 frogs (Rana temporaria). Then, from one muscle, two single fast-twitch fibres were isolated. Each fibre was mounted isometrically in Ringer’s solution, and electrically stimulated using a standardized protocol. Peak force production, normalized by the fibre’s dry mass per unit length, varied by a factor of 1.4. Little variation in normalized force was measured between fibres from the same animal, whereas between animals a significant difference was found (P<0.05). The contralateral muscle was used to determine the myosin fraction of the dry mass. The relationship between the fraction myosin of the dry mass and force normalized by dry mass per unit length showed a high correlation (r = 0.81; n = 12). From this we conclude that variation in normalized tetanic force is determined greatly (65%) by variations in myosin content.
Starting Page	332
Ending Page	334
Page Count	3
File Format	PDF
ISSN	00316768
Journal	Pflügers Archiv
Volume Number	434
Issue Number	3
e-ISSN	14322013
Language	English
Publisher	Springer-Verlag
Publisher Date	1997-06-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Physiology Physiology (medical) Clinical Biochemistry

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