Identification of a methylase required for 2-methylhopanoid production and implications for the interpretation of sedimentary hopanes.

Identification of a methylase required for 2- methylhopanoid production implications for the interpretation of sedimentary hopanes

The general stress response factor EcfG regulates expression of the C-2 hopanoid methylase HpnP in Rhodopseudomonas palustris TIE-1.

Lipid molecules preserved in sedimentary rocks facilitate the reconstruction of events that have shaped the evolution of the Earth's biosphere. A key limitation for the interpretation of many of these molecular fossils is that their biological roles are still poorly understood. Here, we use Rhodopseudomonas palustris TIE-1 to identify factors that induce biosynthesis of 2-methyl hopanoids (2-Me...

Phylogenetic analysis of HpnP reveals the origin of 2-methylhopanoid production in Alphaproteobacteria.

Hopanoids are bacterial steroid-like lipids that can be preserved in the rock record on billion-year timescales. 2-Methylhopanoids are of particular interest to geobiologists because methylation is one of the few chemical modifications that remain after diagenesis and catagenesis. 2-Methylhopanes, the molecular fossils of 2-methylhopanoids, are episodically enriched in the rock record, but we d...

Metaphorical Conceptualization of SPORT Through TERRITORY as a Vehicle

WAR as a vehicle and Sport Is War as a conceptual metaphor (CM) seem inadequate to account metaphorically for SPORT. To cater for an inclusive vehicle/CM, we selected WIN and LOSS lexicon from the news coverage of Brazil’s football team loss to Germany and tested them through the Corpus of Contemporary American English. Then, the data were studied through the 3 stages of metaphor research. In t...

Paleoclimate and Paleoenvironment of Abzalou wetland in Khuzestan Province with using Sedimentary Cores during the Holocene

ta http-equiv=Content-Type content="text/html; charset=utf-8">ta name=ProgId content=Word.Document>ta name=Generator content="Microsoft Word 15">ta name=Originator content="Microsoft Word 15"> Introduction Lake basins have spatially and temporally index patterns and represent valuable maps of physical and chemical history. According to this point, that direct survey of climate changes has on...