Functional implications of the biochemical and structural properties of cytoplasmic contractile proteins.

Actins/metabolism Adenosine Triphosphatases/metabolism Adenosine Triphosphate/pharmacology Amoeba Animals Binding Sites Blood Platelets Calcium/metabolism Cell Membrane/ultrastructure Cell Movement Cytoplasm/metabolism,ultrastructure Humans Magnesium/pharmacology Mitochondria/ultrastructure Myosin Subfragments Myosins/metabolism Polymers Protein Conformation Proteins/metabolism Structure-Activity Relationship Tropomyosin

Actins Myosin Subfragments Polymers Proteins Tropomyosin Adenosine Triphosphate Adenosine Triphosphatases Myosins Magnesium Calcium