Abstract:
:Single twitch muscle fibres have been isolated from various parts of the iliofibularis muscle of Xenopus laevis. After measurements of their isotonic contractile properties, myosin extraction was performed on individual fibres and the extract analysed by various forms of gel electrophoresis. In agreement with previous results three major fibre types, types 1, 2, and 3 could be discerned. Both mechanical data and native isomyosin patterns indicated a further subdivision of types 1 and 2 into subtypes (1n, 1s and 2f, 2n, respectively). Transitional forms between 2n and type 3 were also identified. Types 1 and 2 had the same kinds of light chains (LC1f, LC2, LC3f), but different heavy chains (HC) as observed on 7% SDS gels. Types 3 lacked LC3 and had a more slowly migrating LC1 (LC1s); their HC migration velocity was indistinguishable from that of type 2 HC. A comparison was made between LC1/LC3 ratio and contractile parameters for nine type 1n fibres and six type 2n fibres. No clear correlation was observed between light chain proportions on the one hand and force per cross-sectional area or shortening velocity on the other. It is concluded that myosin heavy chain composition is the major determinant for contractile performance in Xenopus skeletal muscle fibres.
journal_name
J Muscle Res Cell Motiljournal_title
Journal of muscle research and cell motilityauthors
Lännergren Jdoi
10.1007/BF01574594subject
Has Abstractpub_date
1987-06-01 00:00:00pages
260-73issue
3eissn
0142-4319issn
1573-2657journal_volume
8pub_type
杂志文章abstract::This paper studies human gallbladder (GB) smooth muscle contractions. A two-state cross-bridge model was used to estimate the apparent attachment and detachment rate constants, as well as increased Ca2+ concentration from the peak active stress during the isometric contraction. The active stress was computed from a me...
journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/s10974-011-9260-y
更新日期:2011-11-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
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journal_title:Journal of muscle research and cell motility
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/BF01753558
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
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journal_title:Journal of muscle research and cell motility
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journal_title:Journal of muscle research and cell motility
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更新日期:1985-10-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/BF00713270
更新日期:1981-09-01 00:00:00
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journal_title:Journal of muscle research and cell motility
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更新日期:1999-02-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/s10974-020-09573-8
更新日期:2020-01-18 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/BF00123096
更新日期:1993-06-01 00:00:00
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journal_title:Journal of muscle research and cell motility
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journal_title:Journal of muscle research and cell motility
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doi:10.1023/a:1022028808806
更新日期:2002-01-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章,评审
doi:10.1007/s10974-008-9133-1
更新日期:2007-01-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/s10974-010-9212-y
更新日期:2010-08-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/BF01753566
更新日期:1986-12-01 00:00:00
abstract::Skeletal muscle myofibers constantly undergo degeneration and regeneration. Histopathological features of 6 skeletal muscles (cranial tibial [CT], gastrocnemius, quadriceps femoris, triceps brachii [TB], lumbar longissimus muscles, and costal part of the diaphragm [CPD]) were compared using C57BL/10ScSn-Dmd mdx (mdx) ...
journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/s10974-016-9452-6
更新日期:2016-10-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
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journal_title:Journal of muscle research and cell motility
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journal_title:Journal of muscle research and cell motility
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更新日期:1994-10-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章,评审
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更新日期:2020-09-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
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更新日期:1981-06-01 00:00:00
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journal_title:Journal of muscle research and cell motility
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更新日期:2009-01-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/s10974-005-4568-0
更新日期:2005-01-01 00:00:00
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journal_title:Journal of muscle research and cell motility
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更新日期:2001-01-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
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更新日期:1994-02-01 00:00:00
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journal_title:Journal of muscle research and cell motility
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更新日期:2015-06-01 00:00:00
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journal_title:Journal of muscle research and cell motility
pub_type: 杂志文章
doi:10.1007/BF01578427
更新日期:1987-10-01 00:00:00
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journal_title:Journal of muscle research and cell motility
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