Nature of the Calcium Regulatory System of Bovine Arterial Actomyosin
作者:
R.Z. Litten, III,
John Solaro,
George D. Ford,
期刊:
Journal of Vascular Research
(Karger Available online 1979)
卷期:
Volume 16,
issue 1
页码: 26-34
ISSN:1018-1172
年代: 1979
DOI:10.1159/000158187
出版商: S. Karger AG
关键词: Calcium;Arterial actomyosin;Calcium binding;Filament displacement
数据来源: Karger
摘要:
A calcium-sensitive actomyosin was prepared from bovine aortic muscularis. The results of applying filament displacement tests indicate that bovine arterial actomyosin possesses predominantly a calcium regulatory system associated with the myosin filament, but also may possess a calcium regulatory system associated with the actin filament. Calcium binding to highly purified myosin preparations could not account for the calcium binding to calcium-sensitive actomyosin. A calcium-insensitive actomyosin preparation, prepared by omitting dithiothreitol from the isolation procedure, showed a definite loss of tropomyosin but no change in calcium binding relative to the calcium-sensitive actomyosin.
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