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Metabolism Part II: The tricarboxylic acid (TCA), citric acid, or Krebs
Metabolism Part II: The tricarboxylic acid (TCA), citric acid, or Krebs

... t o estimate the efficiency with which electron transport and oxidative phosphorylation capture energy. Assuming that 36 ATP are produced per molecule of glucose consumed, these standard free energies suggest that slightly less than 40% of the enerev eiven off is c a ~ t u r e das ATP. This calculat ...
Lecture 7 (2/06/08) " Single
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... fatty acids involved in cell signaling. ______________ 2. In order to make long polymers of sugar, two monomers can be brought together by enzymes such that their hydroxyl groups (-OH) through couple together. This catalysis is an example of a _______________reaction. condensation ...
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... Generate 12 precursor metabolites needed for cellular synthesis Amino acid biosynthesis » Forms 20 common amino acids » Well characterized in bacteria & yeast » Consumes considerable energy & reducing power ...
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Electrokinetic Salt Removal from Porous Building Materials Using
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... exchange membranes between the electrodes and the porous material to prevent the protons and hydroxyl ions from intruding into the material. The porous material used in this study is fired clay brick, which has been saturated with a 4 mol/l sodium chloride solution prior to the desalination treatmen ...
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Enzymes - part 1

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... device being used to reduce chemical noise and improve detection of low abundance ions. In this case, a fixed compensation voltage was applied to transmit the ion of interest, the Leucine H+ ion [4]. Another example is shown in Figure 8. In this case the separation is of two of the charge states of ...
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... Part 3: Reaction of aliphatic alkoxides with carbon dioxide in the gas phase to yield carbonates in the collision cell of mass spectrometer A series of aliphatic diols (HO-(CH2)n-OH, n = 2-10) are studied under negative ion electrospray ionization conditions. In general, diols are not amenable to E ...
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... • Explains rise of water – even in the tallest plants! • Transpiration – evaporative pull causes tension at top of plant • Column of water pulled up through the plant remains unbroken – due to cohesive (together) and adhesive (others) properties of water ...
Enzymes - Hartismere
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... - The substrate binds to the active site where an enzyme-substrate complex is formed - The substrate then reacts because it is held in such a way by the enzyme that the right atom groups are close enough to react. The active site contains R-groups that also interact with the substrate, forming tempo ...
Mathematical models of ion transport through cell membrane channels
Mathematical models of ion transport through cell membrane channels

... parts interact with two-lipid layers and polar hydrophilic parts form: a) relatively wide non-selective hydrated pores which penetrate membranes, b) specific ion channels, often endowed with special structural elements which form gates sensitive to an electric field, chemical ligands, or to the mech ...
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Magnesium in biology



Magnesium is an essential element in biological systems. Magnesium occurs typically as the Mg2+ ion. It is an essential mineral nutrient (i.e., element) for life and is present in every cell type in every organism. For example, ATP (adenosine triphosphate), the main source of energy in cells, must be bound to a magnesium ion in order to be biologically active. What is called ATP is often actually Mg-ATP. As such, magnesium plays a role in the stability of all polyphosphate compounds in the cells, including those associated with the synthesis of DNA and RNA.Over 300 enzymes require the presence of magnesium ions for their catalytic action, including all enzymes utilizing or synthesizing ATP, or those that use other nucleotides to synthesize DNA and RNA.In plants, magnesium is necessary for synthesis of chlorophyll and photosynthesis.
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