glass bottle a further brown glass bottle is placed under the column and 20 ml acetone is added to the column when the entire elution agent has run through approx 50 ml air is pressed slowly through the column with a disposable syringe and column adapter in order to flush out acetone residue still in the brown glass bottle a further brown glass bottle is placed under the column and 90 ml methanol added to the column when the entire elution agent has run through approx 50 ml air is pressed slowly through the column with a disposable syringe and column adapter in order to flush out methanol residue still in the brown glass bottle the measurement of the lipid fractions is implemented by means of lc esi ms in illustration 2 is shown a typical result of the analysis of the ether lipids here the pg in the inventive strain dsm22921 all forms of unsaturated pg with one to six double bonds can be verified in illustration 1 is represented the lipid content of saturated and unsaturated lipids in the inventive archaea and the dsm5036 strain as described in gibson et al as can be clearly identified the content of unsaturated lipids is considerably higher with the inventive strains than in the known archaea strain more precise analysis of the unsaturated ether lipids for pg and pgs is represented in illustration 3 as shown the unsaturated forms indicated can be verified in.