Ca2+-sensitive transition in the molecular conformation of molluscan muscle myosins |
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| Authors: | M Takahashi Y Fukushima K Inoue Y Hasegawa F Morita K Takahashi |
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| Affiliation: | Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo. |
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| Abstract: | Filament assemblies of myosin molecules purified from scallop adductor muscles were stabilized by Ca2+ in the presence of ATP or ADP. Electron micrographs showed that the tail part of monomeric myosin molecules was folded in the absence of Ca2+, but was extended in the presence of Ca2+ at physiological ionic strength. |
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