“ MgCl2 effectively replaced CaCl2 as a stabilizing agent at 25 degrees C if added with 5 mM EDTA.”
“Sucrose density gradient analysis (in low salt) revealed that CaCl2 plus EDTA enhanced the steroid-receptor complex sedimentation coefficient from 7 S to … S. Unlike molybdate, CaCl2 plus EDTA had no apparent effect on steroid-receptor complex thermal transformation into a nuclear binding form, while MgCl2 … EDTA partially … transformation.”