SUMMARY: The major polar lipids from haloalkaliphilic archaebacteria of the genera and have been analysed by spectroscopic methods, including C NMR, to establish unequivocal structural detail. Diether forms of phosphatidylglycerol (PG) and phosphatidyl-glycerophosphate (PGP) are the major polar lipids; PGP is the main component for all species. spp. show a preponderance of the 2--sesterterpanyl-3--phytanyl glycerol diether form (C, C) of both PG and PGP, whereas has a preponderance of the diphytanylglycerol diether form (C, C) for both. In all cases, PGP (C, C and C, C forms) eluted from silica columns in association with glycine betaine (trimethylglycine).

5 May 1987


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