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An example of a chemoheterotrophhumans animals

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Unformatted text preview: MOHETEROTROPH=HUMANS, ANIMALS, PROTOZOA, FUNGI/MOST BACTERIA Cell composition: Water-->90% wet weight Dry weight-->remove water Elemental composition: SULFER IS FOUND IN PROTEIN/AMINO ACIDS NUCLEIC ACIDS=PHOSPHORUS TRACE ELEMENTS CARBON 50% OXYGEN 20% NITROGEN 14% HYDROGEN 8% PHOSPHORUS 3% SULFUR 1% POTASSIUM 1% SODIUM 1% CA, MGM CL, FE, 0.1 Macronutrients: Autotrophs carbon from CO2 PhotoautotrophsCO2 fixation Requires CO2, ATP and reducing power Calvin cycle-->common pathway ChemoautotrophsOther pathways Green bacteria/photoautrophs (reverse TCA: CO2-->pyruvate) Methylotrophic bacteria (serine pathway: CO2-->AcetyleCoA Carbon Heterotrophs carbon from organic sources Sugars (glucose), amino acids, fatty acids Nitrogen N2 gas FOUND IN CYTOCHROME, NH3 NUCLEIC ACIDS, PROTEINS NO3 Nitrogen fixation NH4Cl/ NH2SO4/amino acids/NA/etc A few can reduce NO3 to a usable form MINIMAL GLUCOSE MEDIUM HAS AMMONIUM CHLORIDE SUPPLIED AS NITROGEN SORCE Nitrogen commonly supplied in media as NH4Cl or organic nitrogen source: Proteins: Casein (milk), gelatin (animal tissue), albumin (blood protein), etc. Peptone: A partia...
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