# 1506: HIGH MAGNESIUM MEDIUM ## Main sol. 1506 20 g MgSO4 x 7 H2O 2 g KCl 10 g Yeast extract 5 g Tryptone 3 g Trisodium citrate x 2 H2O 5 g Casein hydrolysate 1000 ml Distilled water 1. Adjust to pH 7.3.