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Main sol. 1134

Internal Solution-ID: S2275

Equipment needed: Filter Autoclave
Compound Amount Unit Conc. [g/L] Conc. [mM]
K2HPO4 1 g 1 5.741
KNO3 1 g 1 9.891
Na2CO3 11 g 11 103.785
Methanol 2 ml 1.584 49.435
NaCl 18 g 18 308.008
MgSO4 x 7 H2O 2 ml - -
NaS2O3 x 5 H2O 18 g 18 -
Trace element solution SL-6 1 ml - -
Vitamin B12 100 µg 1.0e-4 7.4e-5
Distilled water 1000 ml - -
1 pH 10.0
2 Prepare the medium without methanol, vitamin B12, MgSO4 x 7 H2O and NaS2O3 x 5 H2O in closed vessels with a medium to headspace ratio of 1:5 to 1:10. Add the methanol, MgSO4 x 7 H2O and NaS2O3 x 5 H2O from autoclaved stock solutions after sterilisation of the medium. Vitamin B12 is added from a filter sterilised stock solution to the sterile medium. Incubate the strains with shaking at 150 rpm. Growth is faster in the presence of 20 mM sodium acetate instead of methanol.
1134 METHYLONATRUM MEDIUM