鲎横纹肌粗肌丝长度的变化
Changes in thick filament length in Limulus striated muscle.
作者信息
Dewey M M, Walcott B, Colflesh D E, Terry H, Levine R J
出版信息
J Cell Biol. 1977 Nov;75(2 Pt 1):366-80. doi: 10.1083/jcb.75.2.366.
Abstract
Here we describe the change in thick filament length in striated muscle of Limulus, the horseshoe crab. Long thick filaments (4.0 microns) are isolated from living, unstimulated Limulus striated muscle while those isolated from either electrically or K+-stimulated fibers are significantly shorter (3.1 microns) (P less than 0.001). Filaments isolated from muscle glycerinated at long sarcomere lengths are long (4.4 microns) while those isolated from muscle glycerinated at short sarcomere lengths are short (2.9 microns) and the difference is significant (P less than 0.001). Thin filaments are 2.4 microns in length. The shortening of thick filaments is related to the wide range of sarcomere lengths exhibited by Limulus telson striated muscle.
摘要
在此，我们描述了鲎（马蹄蟹）横纹肌中粗肌丝长度的变化。从活的、未受刺激的鲎横纹肌中分离出的长粗肌丝（4.0微米），而从电刺激或K⁺刺激的纤维中分离出的粗肌丝则明显较短（3.1微米）（P小于0.001）。从长肌节长度甘油化的肌肉中分离出的肌丝较长（4.4微米），而从短肌节长度甘油化的肌肉中分离出的肌丝较短（2.9微米），差异显著（P小于0.001）。细肌丝长度为2.4微米。粗肌丝的缩短与鲎尾节横纹肌所呈现的广泛肌节长度范围有关。
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