1
Prepare the medium anaerobically under nitrogen. Do not adjust the pH.
2
Prepare separate anaerobic stock solutions of, Casamino acids(10%), Yeast extract (10%), and glycine (2M = 150 g/l). A 0.5M polysulphide solution is prepared by dissolving 12.0 g Na2S x 9 H2O in oxygen free water, followed by adding 1.6 g sulphur - the solution will be dark yellow.
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