Hartsiotis A, Gilges S, Hecks B, Achenbach F
Institut für Cytologie, Universität Bonn, Federal Republic of Germany.
Cell Biol Int Rep. 1988 Apr;12(4):245-51. doi: 10.1016/0309-1651(88)90069-0.
The dependence on calcium concentration of the contractile behavior of actomyosin isolated from Physarum plasmodia according to Kohama & Kendrick-Jones (1986) was investigated under different magnesium conditions. The inhibitory calcium sensitivity is reduced at magnesium concentrations above or below 1 mM, i.e., contraction of actomyosin aggregates is most effectively inhibited in the presence of 1 mM calcium in combination with physiological magnesium concentrations. In the absence of calcium reactivation optimum is obtained at 8.5 mM Mg2+.
