Control of tension development in scallop muscle fibres with foreign regulatory light chains

Nature ◽  
1980 ◽  
Vol 286 (5773) ◽  
pp. 626-628 ◽  
Author(s):  
R. M. Simmons ◽  
A. G. Szent-Györgyi
Keyword(s):  
Light Chains ◽  
Muscle Fibres ◽  
Tension Development ◽  
Regulatory Light Chains

Expression of myosin regulatory light chains in rat brain: characterization of a novel isoform

1991 ◽  
Vol 10 (2) ◽  
pp. 97-105 ◽  
Author(s):  
Douglas L. Feinstein ◽  
Michele Durand ◽  
Robert J. Milner
Keyword(s):  
Rat Brain ◽  
Light Chains ◽  
Regulatory Light Chains

The Effects of Acclimation Temperature on a Neuromuscular System of the Crayfish, Astacus Leptodactylus

1979 ◽  
Vol 78 (1) ◽  
pp. 281-293
Author(s):  
MIKKO HARRI ◽  
ERNST FLOREY
Keyword(s):  
Membrane Lipids ◽  
Characteristic Temperature ◽  
Resting Membrane Potential ◽  
Acclimation Temperature ◽  
Muscle Fibres ◽  
Astacus Leptodactylus ◽  
Tension Development ◽  
Temperature Range ◽  
Wide Range ◽  
Warm Acclimation

1. Crayfish, Astacus leptodactylus, were acclimated to 12 °C and to 25 °C. Nerve muscle preparations (closer muscle of walking legs) were subjected to temperatures ranging from 6 to 32 °C. 2. The resting membrane potential of muscle fibres was found to increase with temperature in a linear manner, but with a change in slope at around 170 in cold-acclimated preparations, and around 24 °C in warm-acclimated ones. 3. Temperature acclimation shifted the temperature range of maximal amplitudes of fast and slow e.j.p.s toward the acclimation temperature. Optimal facilitation of slow e.j.p.s also occurred near the respective acclimation temperature. 4. E.j.p. decay time is nearly independent of temperature in the upper temperature range but increases steeply when the temperature falls below a critical range around 17 °C in preparations from cold-acclimated animals, and around 22 °C after acclimation to 25 °C. 5. Peak depolarizations reached by summating facilitated e.j.p.s are conspicuously independent of temperature over a wide range (slow and fast e.j.p.s of cold-acclimated preparations, fast e.j.p.s of warm-acclimated ones) which extends to higher temperatures after warm acclimation in the case of fast e.j.p.s. In warm-acclimated preparations the peak depolarization of slow e.j.p.s first falls then rises and falls again as the temperature increases from 8 to 32 °C. 6. Tension development elicited by stimulation of the slow axon at a given frequency reaches maximal values at the lower end of the temperature range in cold-acclimated preparations. The maximum is shifted towards 20 °C after warm acclimation. Fast contractions decline with temperature; possible acclimation effects are masked by the great lability of fast contractions in warm-acclimated preparations. 7. It is suggested that changes in the composition of membrane lipids may be responsible for the effects of acclimation on the electrical parameters and their characteristic temperature dependence.

scholarly journals 3P172 Dissociation of regulatory light chains from oyvster myosin observed by atomic force microscopy

2005 ◽  
Vol 45 (supplement) ◽  
pp. S246
Author(s):  
M. Taniguchi ◽  
H. Oonishi ◽  
Y. Yazawa ◽  
T. Yamane
Keyword(s):  
Atomic Force Microscopy ◽  
Light Chains ◽  
Force Microscopy ◽  
Regulatory Light Chains ◽  
Atomic Force
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