|  | KH2PO4 | 0.5 | g | 
|  | MgSO4·7H2O | 0.2 | g | 
|  | NaCl | 0.4 | g | 
|  | NH4Cl | 0.6 | g | 
|  | CaCl2·2H2O | 0.05 | g | 
|  | Sodium pyruvate | 1 | g | 
|  | Sodium succinate | 1 | g | 
|  | Sodium acetate | 1 | g | 
|  | Peptone | 0.3 | g | 
|  | Yeast extract | 0.3 | g | 
|  | Ferric citrate solution* (0.1%) | 5 | ml | 
|  | Trace element solution SL7** | 1 | ml | 
|  | NaHCO3 (3% (w/v)) | 50 | ml | 
|  | Vitamin B12 (0.002% (w/v)) | 1 | ml | 
|  | Na2S2O3·5H2O | 0.248 | g | 
|  | Na2S·9H2O | 0.24 | g | 
|  | Resazurin | 1 | mg | 
|  | Distilled water | 1 | L | 
|  | pH 7 |  | 
|  | 
|  |  | Mix ingredients except for vitamin B12, NaHCO3 and Na2S·9H2O, and autoclave under a N2 atmosphere. Separately autoclave Na2S·9H2O solution under a N2 atmosphere. Sterilize vitamin B12 and NaHCO3 solutions by filtration. Prior to inoculation, aseptically and anaerobically add them. For strain JA492, inoculum size should be higher than 10 %. | 
|  |  |  |  |  |  |  | 
|  |  | *Soluble in hot water. | 
|  |  |  |  |  |  |  | 
|  |  | **Trace element solution SL7 | 
|  |  |  | HCl (25%; 7.7 M) | 10 | ml | 
|  |  |  | FeCl2·4H2O | 1.5 | g | 
|  |  |  | ZnCl2 | 70 | mg | 
|  |  |  | MnCl2·4H2O | 100 | mg | 
|  |  |  | H3BO3 | 60 | mg | 
|  |  |  | CoCl2·6H2O | 200 | mg | 
|  |  |  | CuCl2·2H2O | 20 | mg | 
|  |  |  | NiCl2·6H2O | 20 | mg | 
|  |  |  | Na2MoO4·2H2O | 40 | mg | 
|  |  |  | Distilled water | 990 | ml | 
|  | 
|  |  | Initially, dissolve FeCl2·4H2O in 25% HCl, then add distilled water followed by the other components. |