Cross-linking of actin filaments by heavy meromyosin. |
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Authors: | J Trinick G Offer |
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Affiliation: | Agricultural Research Council Meat Research Institute Langford Bristol BS18 7DY, England;Department of Biophysics King''s College 26-29 Drury Lane London WC2B 5RL, England |
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Abstract: | The structure of acto-heavy meromyosin has been examined by electron microscopy. When heavy meromyosin is mixed with actin at ~ 2 mg/ml a gel is formed. At lower actin concentrations more ordered assemblies are formed in which the actin filaments are in “rafts” about 300 Å apart cross-linked by heavy meromyosin. These results indicate that in solution the two heads of a heavy meromyosin molecule can bind to different actin filaments. |
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