Results 141 to 150 of about 5,158 (166)

Electroporation of archaeal lipid membranes using MD simulations

Bioelectrochemistry, 2014
Molecular dynamics (MD) simulations were used to investigate the electroporation of archaeal lipid bilayers when subjected to high transmembrane voltages induced by a charge imbalance, mimicking therefore millisecond electric pulse experiments. The structural characteristics of the bilayer, a 9:91 mol% 2,3-di-O-sesterterpanyl-sn-glicerol-1-phospho-myo ...
Andraž, Polak, Mounir, Tarek, Matija, Tomšič, Janez, Valant, Nataša Poklar, Ulrih, Andrej, Jamnik, Peter, Kramar, Damijan, Miklavčič   +7 more
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Analysis of archaeal ether lipids in bovine faeces

Animal Feed Science and Technology, 2011
a b s t r a c t This study evaluated concentrations of archaeol, a lipid biomarker for Archaea and, presum- ably, methanogens in cattle faeces. Twelve continental cross-bred steers were allocated at random to receive either a concentrate based diet or a grass silage based diet.
Gill, FL, Dewhurst, RJ, Evershed, RP, McGeough, E, O'Kiely, P, Pancost, RD, Bull, ID   +6 more
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Archaeal lipids record paleosalinity in hypersaline systems

Organic Geochemistry, 2011
Abstract We present an ecologically based biomarker method for estimating past salinity, especially in hypersaline conditions. The relative amounts of acyclic diether and tetraether membrane lipids synthesized by Archaea correlate with salinity from 0–250 practical salinity units (psu) in modern settings.
Courtney Turich, Katherine H. Freeman
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Stable Liposomes Formed from Archaeal Ether Lipids

1993
Liposomes have application in serving as a support, or matrix, to form two dimensional crystals from those proteins which normally interact with the cytoplasmic membrane (Wingfield et al., 1979). This interaction includes membrane proteins that are largely embedded within the lipid bilayer, others with relatively more surface area exposed, and surface ...
Choquet, Christian G., Patel, Girishchandra B., Sprott, G. Dennis, Beveridge, Terry J.   +3 more
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Archaeal lipids in Neogene dolomites (Monterey and Sisquoc Formations, California) – Planktic versus benthic archaeal sources

Organic Geochemistry, 2011
Abstract The distribution of archaeal lipids, including archaeol and glycerol dibiphytanyl glycerol tetraethers (GDGTs), in dolomite concretions and surrounding sediment from the Monterey Formation (Miocene) and the Sisquoc Formation (Miocene–Pliocene) were examined to distinguish planktic from benthic contributions.
Hoffmann-Sell, L., Birgel, D., Arning, E., Föllmi, K., Peckmann, J.   +4 more
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Archaeal Lipids as an Adaptation to Higher Temperatures?

2017
A hypothesis is presented that the lipids of Archaea are an adaptation to a high temperature origin, possibly as an adaptation to higher sea temperatures during an early bombardment? This is separate from the issue that Eukaryotes arose before Prokaryotes (Akaryotes on our terminology). Archaeal lipids are basically isoprenoid compounds.
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Stability and proton-permeability of liposomes composed of archaeal tetraether lipids

Biochimica et Biophysica Acta (BBA) - Biomembranes, 1994
Liposomes composed of tetraether lipids originating from the thermoacidophilic archaeon Sulfolobus acidocaldarius were analyzed for their stability and proton permeability from 20 degrees C up to 80 degrees C. At room temperature, these liposomes are considerably more stable and have a much lower proton permeability than liposomes composed of diester ...
Elferink, Marieke G.L., Wit, Janny G. de, Driessen, Arnold J.M., Konings, Wil N.   +3 more
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Influence of bottom seawater oxygen on archaeal tetraether lipids in sediments: Implications for archaeal lipid-based proxies

Marine Chemistry, 2022
Jinqiang Guo, Huamao Yuan, Jinming Song, Xuegang Li, Liqin Duan, Ning Li, Yingxia Wang   +6 more
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Dynamics and Organization of Archaeal Tetraether Lipid Membranes

2017
Archaeal bipolar tetraether lipids (BTLs) have distinct structural differences from the lipids isolated from bacteria and eukaryotes. Because of the presence of the unusual structural features, such as macrocyclic structures, cyclopentane rings, isoprenoid units, tetraether linkages, and a variety of polar head groups, archaeal BTL membranes possess ...
Parkson Lee-Gau Chong, Alexander Bonanno, Umme Ayesa   +2 more
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Archaeal lipids: structural features and supramolecular organization

Thin Solid Films, 1996
Abstract The Archaea domain, formed exclusively of extremophilic prokaryotic organisms, represents a third evolutive line distinct from the wellknown Eubacteria and Eukarya domains. Archaeal lipids are based on ether links and their aliphatic components are isoprenic in nature.
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