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Main sol. 1204

Internal Solution-ID: S2404

Equipment needed: Hungate tubes Filter Autoclave Gassing station
Compound Amount Unit Conc. [g/L] Conc. [mM]
NaCl 1.00 g 1 17.112
KCl 0.50 g 0.5 6.707
NH4Cl 0.30 g 0.3 5.609
KH2PO4 0.20 g 0.2 1.47
Na2SO4 0.15 g 0.15 1.056
MgCl2 x 6 H2O 0.40 g 0.4 1.968
CaCl2 x 2 H2O 0.10 g 0.1 0.68
Yeast extract 4.00 g 4 -
Casein peptone 2.00 g 2 -
Sodium resazurin
(0.1% w/v)
0.50 ml 5.0e-4 -
Na2CO3 1.00 g 1 9.435
Maltose monohydrate 2.00 g 2 5.551
DL-Dithiothreitol
(DTT)
0.80 g 0.8 5.185
Distilled water 1000.00 ml - -
1 Dissolve ingredients except carbonate, maltose and DTT, then sparge medium with 100% N2 gas for 30 - 45 min to make it anoxic. Dispense medium under same gas atmosphere into anoxic Hungate-type tubes or serum vials and autoclave at 121°C for 20 minutes. Add maltose and DTT from sterile anoxic stock solutions prepared under 100% N2 gas and sterilized by filtration and carbonate from a sterile stock solution prepared under 80% N2 and 20% CO2 gas atmosphere. Check pH of complete medium and adjust to 7.4, if necessary.
1204 SPHAEROCHAETA MEDIUM