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Main sol. 282a

Internal Solution-ID: S549

Equipment needed: Filter Autoclave Gassing station Hungate tubes
Compound Amount Unit Conc. [g/L] Conc. [mM]
K2HPO4 0.14 g 0.138 0.794
CaCl2 x 2 H2O 0.14 g 0.138 0.941
NH4Cl 0.25 g 0.247 4.618
MgSO4 x 7 H2O 3.40 g 3.36 13.631
MgCl2 x 6 H2O 4.10 g 4.051 19.928
KCl 0.33 g 0.326 4.374
NiCl2 x 6 H2O
(0.1% w/v)
0.50 ml 4.9e-4 0.004
NaCl 18.00 g 17.787 304.356
Fe(NH4)2(SO4)2 x 6 H2O 0.01 g 0.01 -
Modified Wolin's mineral solution 10.00 ml - -
Sodium resazurin
(0.1% w/v)
0.50 ml 4.9e-4 0.002
NaHCO3 1.00 g 0.988 11.763
Wolin's vitamin solution (10x) 1.00 ml - -
L-Cysteine HCl x H2O 0.50 g 0.494 2.813
Na2S x 9 H2O 0.50 g 0.494 2.057
Distilled water 1000.00 ml - -
1 Dissolve ingredients except bicarbonate, vitamins, cysteine and sulfide. Sparge medium with 80% H2 and 20% CO2 gas mixture for 30 - 45 min to make it anoxic. Add and dissolve bicarbonate, then dispense medium into anoxic tubes to 30% of their volume under 80% H2 and 20% CO2 gas atmosphere and autoclave. Add vitamins (sterilized by filtration), cysteine and sulfide from sterile anoxic stock solutions prepared under 100% N2 gas. Prior to use check pH of complete medium and adjust to 6.0, if necessary.
2 After inoculation add sterile 80% H2 and 20% CO2 gas mixture to 2 bar overpressure.
282a METHANOCALDOCOCCUS VILLOSUS MEDIUM