title: Proceedings: The influence of Mg2+ concentration and of pH upon the relationship between steady-state isometric tension and Ca2+ concentration in isolated bundles of barnacle myofibrils.
mesh_terms: D000818:Animals; D002118:Calcium / Q000502:physiology*; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D008274:Magnesium / Q000502:physiology*; D009119:Muscle Contraction; D009210:Myofibrils / Q000502:physiology*; D001468:Thoracica / Q000502:physiology*
chemical_list: D008274:Magnesium; D002118:Calcium