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Main sol. 88a

Internal Solution-ID: S156

Equipment needed: Autoclave Water bath Gassing station Hungate tubes
Compound Amount Unit Conc. [g/L] Conc. [mM]
(NH4)2SO4 1.30 g 1.3 9.838
KH2PO4 0.28 g 0.28 2.058
MgSO4 x 7 H2O 0.25 g 0.25 1.014
CaCl2 x 2 H2O 0.07 g 0.07 0.476
FeCl3 x 6 H2O 0.02 g 0.02 0.074
Allen's trace element solution 10.00 ml - -
Sulfur
(powder)
10.00 g 10 311.818
Yeast extract
(OXOID)
0.50 g 0.5 -
Na2S x 9 H2O 0.50 g 0.5 2.082
Distilled water 1000.00 ml - -
1 Dissolve ingredients (except sulfur, yeast extract and sulfide), adjust pH of the salt solution at room temperature to 4.0 using 1 N H2SO4 and sparge medium with 100% N2 gas to make it anoxic. Dispense medium under same gas atmosphere into anoxic Hungate-type tubes or serum vials that contain already the appropriate amount of sulfur. Sterilize medium by heating cultivation vessels in a boiling water bath for 1 - 2 hours on each of 3 successive days. Add yeast extract and sulfide from sterile anoxic stock solutions prepared under 100% N2 gas. Prior to inoculation check pH and adjust to 4.0, if necessary.
88a SULFOLOBUS MEDIUM (ANAEROBIC)