Mechanistic roles of tyrosine 149 and serine 142 in UDP-galactose 4-epimerase from E. coli. Biochemistry 36‚ 10675–10684. 31. Mizuguchi‚ H.‚ Hayashi‚ H.‚ Okada‚ K.‚ Miyahara‚ I.‚ Hirotsu‚ K.‚ and Kagamiyama‚ H. (2001) Strain is more important than electrostatic interaction in controlling the pK a of the catalytic group in aspartate aminotransferase. Biochemistry 40‚ 353–360. 32. Druckmann‚ S.‚ Ottolenghi‚ M.‚ Pande‚ A.‚ Pande‚ J.‚ and Callender‚ R. H. (1982) Acid-base equilibrium of the Schiff base in
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Discussion: In the first part of the experiment‚ chronoamperometry was used to determine the diffusion coefficient of ferricyanide. The chronoamperogram can be seen in Graph 1. The chronoamperogram shows three distinct regions. [1A] Region “a” is where the electrode potential is higher than the ferricyanide’s potential‚ so no reduction reaction takes place. Region “b” is where the potential is decreased to a potential much lower than that of ferricyanide. This results in the ferricyanide consuming
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O 29. 30. 31. 32. 33. 34. 35. 36. 37. b. Group 1A; 1 valence electron c. Group 5A; 5 valence electrons d. Group 2A; 2 valence electrons e. Group 7A; 7 valence electrons f. Group 4A; 4 valence electrons a. Cl b. S c. Al d. Li by gaining or losing electrons a. 2 b. 3 c. 1 d. 2 a. Al3+ b. Li+ c. Ba2+ d. K+ e. Ca2+ c. Sr2+ Most nonmetals gain 1‚ 2‚ or 3 electrons to achieve a noble-gas electron configuration. a. 3 b. 2 c. 1 d. 3 a. S2– b. Na+ c. F– d. P3– a
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atom to another. This gives one ion a positive charge and the other a negative one. The Opposite charges in the ion hold them together in a regular three dimensional lattice by electrostatic attractions; the arrangement of the ions in a crystalline lattice depends on the relative size of the ions. These electrostatic attractions are strong and this means that a large amount of energy is needed to overcome them and separate the ions‚ as a result of these ionic compounds have very high melting points
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Water • Define the terms solute‚ solvent and solution • Solute: Substances dissolved by the solvent (or the component present in a lower amount) • Solvent: Substances in which solutes are dissolved (or the component present in a larger amount) • Solution: A homogenous mixture of 2 or more substances • 1.1.2. Identify the importance of water as a solvent. • Water is distributed in the biosphere‚ lithosphere‚ hydrosphere and atmosphere • On earth‚ it is distributed as a solid‚ liquid and gas
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Micropower Energy Harvesting Abstract More than a decade of research in the field of thermal‚ motion‚ vibration and electromagnetic radiation energy harvesting has yielded increasing power output and smaller embodiments. Power management circuits for rectification and DC–DC conversion are becoming able to efficiently convert the power from these energy harvesters. This paper summarizes recent energy harvesting results. Introduction The low power consumption of silicon-based electronics
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5 Computational Virtual Screening Towards Designing Novel Anticancer Drugs Po-Yuan Chen1‚2 1Department of Biological Science and Technology‚ China Medical University‚ Taichung‚ Taiwan‚ 2Brain Research Centre‚ University of British Columbia‚ Vancouver‚ 1Republic of China 2Canada 1. Introduction Generally speaking‚ Docking is most popular and critical issue in this research field‚ because it contains most important information both Ligands (Drugs) and Receptors (it can be intracellular protein
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IB Chemistry Summary- By Paul Li & Silvia Riggioni TABLE OF CONTENTS Table of Contents............................................................................................................................................................ 1 Atomic Theory................................................................................................................................................................ 3 The Electromagnetic Spectrum.............................................
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8.2 Chemical Earth 8.2.1 The living and non-living components of the Earth contain mixtures * Construct word and balanced formulae equations of chemical reactions as they are encountered Combustion reaction (burning) element + oxygen → oxide e.g. 4Na (S) + O2 (g) → Na2O (s) Reaction with hydrogen element + hydrogen → hydride e.g. Ca (s) + H2 (g) → CaH2 (s) Reaction between an oxide and water metallic oxide + water → hydroxide * metallic oxide is also known as “basic oxide” e.g
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affinity for oxygen. 1c) Cooperativity is a key feature of the haemoglobin when exposed to oxygen; this is shown when the globin units of deoxyhaemoglobin are tightly held by electrostatic bonds in a conformation with a relatively low affinity for oxygen. The binding of oxygen to a heme molecule breaks some of the electrostatic bonds between the globin subunits‚ leading to a conformation change that leaves the remaining oxygen binding sites more exposed‚ thus the binding of one oxygen molecule to deoxyhaemoglobin
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