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This question got me thinking about what are the metabolic enzymes that take oxygen up in E coli. I searched the metacyc database for reactions that consume molecular oxygen and there are only 3 that take in oxygen and one that produces oxygen. All three consumers of oxygen in E coli are the oxidation of ubiquinone by at two sites in cytochrome bcl or by ...


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The plasma membrane is quite permeable to oxygen and thus oxygen enters the cell simply by diffusion. Reactive oxygen species can be reduced enzymatically in aerobic organisms. Obligate anaerobes lack or don't produce sufficient quantities of these enzymes. An organism that doesn't use oxygen for metabolism but is also not relatively harmed by it can be ...


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Apparently, both are true. ...Individual differences exist in both odorant production and odor perception. The biological basis for the inability to produce the metabolite in detectable quantities is unknown, but the inability to smell the odor is associated with a single nucleotide polymorphism (rs4481887) within a 50-gene cluster of olfactory ...


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NAD+ is important in this step, since it is co-factor for the glyceraldehyde-3-phosphate dehydrogenase (G3PDH), which acts as a acceptor for the hydrogen atom from the C1 (see below). If you look at the reaction, the aldehyde from the C1 is oxidized to a carboxylic acid which in a second step is turned into a phosphoester. To do so, a cysteine from the ...


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Factors that can lower body temperature: low environment temperature low metabolic rate hypothyroidism I couldn't find any relevant study addressing the Japanese people situation, but: There is significant variation in metabolic rate in humans, independent of differences in body size, body composition, age, and gender. Although it has been generally ...


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This entire post is taken from odd thinking: http://skeptics.stackexchange.com/questions/10309/do-japanese-people-have-a-lower-body-temperature-than-caucasians There may be a difference, depending on whether you are talking about internal or skin temperatures. This study compared 9 Japanese men to the results of a similar study done in Ohio with Caucasian ...


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A significant amount of heat generated by the cell does not come from the hydrolysis of an NTP. ATP is generated by a H+ gradient in the mitochondria, and this gradient is created by mechanisms which rely only in part by ATP. Most of the energy stores in our bodies are not in the NTP pool. This is why CO2 and urine are used to measure energy expenditure ...


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The diversity of fatty acids produced by an organism is limited by the diversity of enzymes which synthesize them. Unsaturated fatty acids contain carbon-carbon double bonds which do not isomerize. The capacity for humans to produce cis fatty acids is probably selected for because of their lower melting point which prevents arterial clogging. Cold blooded ...



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