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Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA. ↑ Comparison of the DNA association kinetics of the Lac repressor tetramer, its dimeric mutant LacIadi, and the native dimeric Gal repressor Hsieh M, Brenowitz M.↑ Unique Reactivity of Organic Compounds in Aqueous Suspension Sridhar Narayan, John Muldoon, M.↑ For relevant citations also see the satellite pages.What is the structure of water? According to Science Magazine in 2005, one of the 100 outstanding unsolved problems in science revolves around the question of how water forms hydrogen bonds with its neighbors in bulk water.What is the nature of bonding in hypervalent molecules? See Hypervalent molecules.splitting of water to H 2 and O using solar energy.) How can electromagnetic energy ( photons) be efficiently converted to chemical energy? (E.g.Feynmanium: What are the chemical consequences of having an element, with an atomic number above 137, whose 1s electrons must travel faster than the speed of light? Is " Feynmanium" the last chemical element that can physically exist? The problem actually occurs at Element 139 (eka-actinium/dvi-lanthanum), since complete analysis involving relativity gives a smaller result for the velocity of the 1s electrons, therefore allowing stable 1s orbits in the element 138 (Uto).What is the electronic structure of the high temperature superconductors at various points on the phase diagram? Can the transition temperature be brought up to room temperature? See Superconductor.What are the chemical origins of life? How did non-living chemical compounds generate self-replicating, complex life forms? See Abiogenesis.Protein folding problem: Is it possible to predict the secondary, tertiary and quaternary structure of a polypeptide sequence based solely on the sequence and environmental information? Inverse protein-folding problem: Is it possible to design a polypeptide sequence which will adopt a given structure under certain environmental conditions? See Protein folding.What is the origin of homochirality in amino acids and sugars? See Homochirality.Better-than perfect enzymes: Why do some enzymes exhibit faster-than-diffusion kinetics? See Enzyme kinetics.Nucleophiles with an electronegative atom and one or more lone pairs adjacent to the nucleophilic center are particularly reactive.
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What is the origin of the alpha effect?.What is the origin of the bond rotation barrier in ethane, steric hindrance or hyperconjugation? See Bond rotation barrier.On-water reactions: Why are some organic reactions accelerated at the water-organic interface? See On-water reactions.Solvolysis of the norbornyl cation: Why is the norbornyl cation so stable? Is it symmetrical? This problem has been largely settled for the unsubstituted norbornyl cation, but not for the substituted cation.