Modified rare earth semiconductor oxide as a new nucleotide probe

Article Abstract:

An experiment was conducted to study the feasibility of using praseodymium oxide [Pr.sub.6][O.sub.11], a modified rare earth semiconductor, as new sensing material for the development of a novel electrochemical DNA-sensor. It was shown that the semiconducting [Pr.sub.6][O.sub.11] particles as a thin film could be developed as a direct electrochemical nucleic acid sensor without the use of labeled oligonucleotides at slightly elevated temperatures above ambient conditions.

Electric properties, Nucleic acids, Nucleic acid synthesis, Praseodymium

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DNA and estrogen receptor interaction revealed by fragment molecular orbital calculations

Article Abstract:

The fragment molecular orbital (FMO) method was used to perform molecular orbital calculations of the complex between DNA-ERE (estrogen response element) and ER (estrogen receptor)-DBD (DNA binding domain). The results revealed that the ER-DBD dimer has larger ESP values and therefore can bind more strongly to DNA than the ER-DBD monomer, thus indicating that ER-DBD dimer is crucial for interactions between the recognition helix and base pairs.

Science & research, Research, Estrogen, Estrogen receptors, Molecular orbitals

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Solvent effects on the suppression of oxidative decomposition of guanines by phenyl group attachment in deoxyribonucleic acid (DNA)

Article Abstract:

The energetics of the phenyl group attachment to a guanine is analyzed by semiempirical Hartree-Fock (HF) molecular orbital (MO) calculations and ab initio HF MO calculations with the STO-3G basis set. The solvent effect is examined for DNA molecules with other functional groups, a benzyl-group-attached DNA and the tert-butyl-group-attached DNA.

Guanine, Chemistry, Physical and theoretical, Physical chemistry, Phenyl compounds

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