Answers are grounded in this paper and cite their sources.
Ca2+-dependent phosphorylation of the 20000-Mr regulatory light chain was found to be a necessary condition for the Ca2+-sensitivity of the Mg2+-dependent ATPase activity and superprecipitation of pig carotid actomyosin. Actin-myosin interaction independent of phosphorylation and Ca2+ (ATPase activity and superprecipitation) were demonstrated in aged actomyosin preparations and in preparations from which the regulatory light chains were removed by papain digestion.
No takes yet. Share an insight, caveat, or question.
Mrwa et al. (1980) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: