Difco Micro Assay Culture Agar 37 g (Difco B 319) Distilled water 1000 ml pH 6.7 Formulae Difco: Micro Assay Culture Agar, Approximate Formula* Per Liter Proteose Peptone No. 3 5 g Yeast Extract 20 g Dextrose 10 g Monopotassium Phosphate 2 g Polysorbate 80 0.1 g Agar 10 g