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- W1986355243 abstract "A new archaeal lipid biomarker, C20,25 sn-2, C-7 hydroxy isoprenoid glycerol diether, has been identified in methane-related carbonates from six methane seep locations. The molecular structure resembles that of sn-2 hydroxyarchaeol but the hydroxy group-bearing moiety at the sn-2 position comprises a regular C25 instead of a C20 isoprenoid chain. Compound specific stable carbon isotope measurements revealed δ13C values ranging from −96‰ to −129‰, which are similar to δ13C values of sn-2 hydroxyarchaeol. This supports the origin of the novel compound from archaea involved in the anaerobic oxidation of methane. It also suggests a common source, i.e. archaea within the ANME-2 group, which is consistent with the previously reported 16S rDNA data for the same samples. The frequent appearance of the novel sn-2 isoprenoidal hydroxy glycerol diether in cold seepage sediments with high salinity environments, and its distinct structural similarities with membrane lipids of halophilic and methanogenic microbes, suggests that ANME-2 methanotrophic archaea thriving at elevated salinity are the possible biological source for this specific lipid." @default.
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- W1986355243 date "2008-08-01" @default.
- W1986355243 modified "2023-10-10" @default.
- W1986355243 title "Extended hydroxyarchaeol, a novel lipid biomarker for anaerobic methanotrophy in cold seepage habitats" @default.
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- W1986355243 doi "https://doi.org/10.1016/j.orggeochem.2008.04.019" @default.
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