Maruta, H Acanthamoeba cofactor protein is a heavy chain kinase required for actin activation of the Mg2+-ATPase activity of Acanthamoeba myosin I. [electronic resource] - The Journal of biological chemistry Dec 1977 - 8329-32 p. digital Publication Type: Journal Article ISSN: 0021-9258 Subjects--Topical Terms: Actins--metabolismAdenosine Triphosphatases--metabolismAmoeba--enzymologyAnimalsEnzyme ActivationKineticsMagnesium--pharmacologyMolecular WeightMyosins--isolation & purificationProtein Kinases--isolation & purification