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Main sol. 1637

Internal Solution-ID: S3400

Equipment needed: Hungate tubes Filter Autoclave Gassing station
Compound Amount Unit Conc. [g/L] Conc. [mM]
Trypticase peptone
(BD BACTO)
16.0 g 15.686 -
Yeast extract
(OXOID)
7.0 g 6.863 -
NaCl 5.0 g 4.902 83.88
L-Cysteine HCl x H2O 0.5 g 0.49 2.791
NaHCO3 0.5 g 0.49 5.835
Haemin solution 5.0 ml - -
Vitamin K1 solution 5.0 ml - -
Sodium resazurin
(0.1% w/v)
0.5 ml 4.9e-4 0.002
Methanol
(15% v/v)
10.0 ml 7.765 242.329
DL-Dithiothreitol 1.0 g 0.98 6.354
Distilled water 1000.0 ml - -
1 Dissolve ingredients except for methanol and dithiothreitol. Adjust pH to 7.5 with 1 N NaOH and sparge medium with 100% N2 gas for 30 - 45 min to make it anoxic. Distribute medium under 100% N2 gas atmosphere into anoxic Hungate-type tubes or serum vials to 30% of their volume and autoclave. After sterilization add methanol from a sterile anoxic stock solution (15% v/v) autoclaved under 100% N2 gas atmosphere and dithiothreitol from an anoxic stock solution sterilized by filtration. Before use check the pH of the complete medium and adjust it to 7.6 - 7.8, if necessary.
2 After inoculation, add sterile 80% H2 and 20% CO2 gas mixture to 0.5 bar overpressure. After growth becomes visible overpressure of 80% H2 and 20% CO2 gas mixture can be increased to 1 bar.
3 Note: Use 10% (v/v) as inoculum.
1637 METHANOMASSILIICOCCUS LUMINYENSIS MEDIUM