DSMZ 990 . YPS MEDIUM

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Selected strain: Thermococcus gammatolerans DSM 15229

This strain uses the standard medium without modifications.


Growth conditions: 88 °C
Equipment needed: Hungate tubes

Final pH: 6.8

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ml
Compound Amount Unit
Sea Salt
(Sigma)
35.00 g
PIPES 3.46 g
Yeast extract 1.00 g
Peptone 4.00 g
Elemental sulphur 5.00 g
NH4Cl 0.50 g
KH2PO4 0.35 g
CaCl2 0.20 g
FeCl3 6.70 mg
Na2WO4 2.90 mg
Resazurin 0.10 mg
Na2S x 9 H2O 0.25 g
Distilled water 1000.00 ml
1 Prepare the medium without the yeast extract, peptone and sodium sulphide. Boil the medium and cool under nitrogen. Adjust the pH to 6.8. Dispense into hungate tubes or serum bottles under a nitrogen atmosphere. Sterilise the medium at 100°C for 3 hours on 3 consecutive days. Add the peptone and yeast extract from sterile (10% w/v) stock solutions. The medium is reduced by adding a sterile, neutralised 5% w/v sodium sulphide solution to an end concentration of 0.025%. Final pH should be 6.8