# 656: YEAST-STARCH-AGAR(B) ## Main sol. 656 15 g Starch (soluble) 4 g Yeast extract (Bacto) 0.5 g K2HPO4 0.5 g MgSO4 x 7 H2O 20 g Agar 1000 ml Distilled water 1. Adjust pH to 7.4.