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Main sol. J231

Internal Solution-ID: S3908

Equipment needed: Autoclave Anaerobic workbench
Compound Amount Unit Conc. [g/L] Conc. [mM]
KH2PO4 0.30 g 0.3 2.204
(NH4)2SO4 1.50 g 1.5 11.352
NaCl 0.60 g 0.6 10.267
MgSO4 x 7 H2O 0.12 g 0.12 0.487
CaCl2 x 2 H2O 0.08 g 0.08 0.544
FeSO4 x 7 H2O 4.00 mg 0.004 0.014
K2HPO4 0.15 g 0.15 0.861
Na2CO3 4.00 g 4 37.74
Trace vitamins 10.00 ml - -
Trace element solution 10.00 ml - -
L-Cysteine HCl x H2O 0.50 g 0.5 -
Na2S x 9 H2O 0.50 g 0.5 2.082
Resazurin 1.00 mg 1.0e-3 0.004
Distilled water 980.00 ml - -
1 Mix ingredients, except cysteine x HCl and Na2S x 9H2O, and adjust pH to 7.2. Bring to a boil for 5-10 sec, then, cool down under a stream of H2-CO2 (80:20). Dispense the medium into suitable culture vessels (e.g., 20 ml of the medium in 120 ml serum bottles) under a stream of H2-CO2 (80:20) and seal with butyl rubber stoppers. After autoclaving, stand the medium overnight. Separately autoclave cysteine x HCl and Na2S x 9H2O as 5% solutions, respectively, under a N2 atmosphere. Prior to inoculation, aseptically and anaerobically add the cysteine x HCl and Na2S x 9H2O solutions. Pressurize the inoculated bottles to 100 kPa H2-CO2 (80:20).
J231 METHANOBACTERIUM THERMOAUTOTROPHICUM MEDIUM