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Main sol. 1456

Internal Solution-ID: S2990

Equipment needed: Filter Autoclave Hungate tubes Gassing station
Compound Amount Unit Conc. [g/L] Conc. [mM]
K2HPO4 0.3 g 0.3 1.722
KH2PO4 0.3 g 0.3 2.205
NaCl 1.0 g 1 17.112
NH4Cl 1.0 g 1 18.695
KCl 0.1 g 0.1 1.341
CaCl2 x 2 H2O 0.1 g 0.1 0.68
MgCl2 x 6 H2O 0.5 g 0.5 2.459
Na2SO4 2.8 g 2.8 19.713
Yeast extract
(OXOID)
1.0 g 1 -
Trypticase peptone
(BD BBL)
1.0 g 1 -
Trace element solution SL-10 1.0 ml - -
Sodium resazurin
(0.1% w/v)
0.5 ml 5.0e-4 -
Na2CO3 1.5 g 1.5 14.153
Na-pyruvate 2.5 g 2.5 22.718
L-Cysteine HCl x H2O 0.5 g 0.5 2.847
Na2S x 9 H2O 0.5 g 0.5 2.082
Distilled water 1000.0 ml - -
1 Dissolve ingredients except carbonate, pyruvate, cysteine and sulfide, then sparge medium with 80% N2 and 20% CO2 gas mixture for 30 - 45 min to make it anoxic. Dispense medium under the same gas atmosphere into anoxic Hungate-type tubes or serum vials and autoclave. Add pyruvate (sterilized by filtration), cysteine and sulfide from sterile anoxic stock solutions prepared under 100% N2 gas and carbonate from a sterile anoxic stock solution prepared under 80% N2 and 20% CO2 gas mixture. Prior to use adjust pH of complete medium to 7.0 - 7.2, if necessary.
1456 DESULFOSOMA MEDIUM