For DNA differential diagnosis of human Taenia cestodes, a base excision sequence scanning thymine-base method using the cytochrome c oxidase subunit I and cytochrome b genes as targets was used. The characteristic thymine-base peak profiles provide four distinct types, unique for T. saginata, T. asiatica, and two genotypes of T. solium. This approach provides a useful tool for the identificati...

A Zn(II) macrocyclic complex with appended quinoline is a bifunctional recognition agent that uses both the Zn(II) center and the pendent aromatic group to bind to thymine in bulges with good selectivity over DNA containing G, C or A bulges. Spectroscopic studies show that the stem containing the bulge stays largely intact in a DNA hairpin with the Zn(II) complex bound to the thymine bulge.

Crude extracts of normal human diploid fibroblasts and of human peripheral blood lymphocytes excise thymine dimers from purified ultraviolet-irradiated DNA, or from the DNA presumably present as chromatin in unfractionated cell-free preparations of cells that had been labeled with [3H]thymidine. Extracts of xeroderma pigmentosum cells from complementation groups A, C, and D also excise thymine ...

Dipole-bound and valence-bound anions of thymine were characterised by means of state-of-the-art ab initio calculations. The dipole-bound anion of thymine is both vertically and adiabatically stable with adiabatic electron affinity of 51 meV. The valence-bound anion is also adiabatically stable, albeit only marginally. Its vertical stability of 501 meV is, however, higher than that of the dipol...

The results of MO INDO calculations of some thymine radicals are presented. These include as well as the hydrogen addition radicals the hydroxyl addition radicals to C5 and to C6 of the C5=C6 double bond of the thymine molecule. The radicals resulting from hydrogen abstraction from the methyl group and from the nitrogen N1 are also studied. Except for radicals where the main spin density is loc...

E. coli cells initiating chromosome replication after release from amino-acid starvation were incubated in [(3)H]thymine of moderate specific activity, followed by incubation in [(3)H]thymine plus [(3)H]thymidine of very high specific activity. The grain tracks produced in autoradiographs of chromosomes were denser on both ends than in the middle. The autoradiographic patterns are, therefore, e...

On-the-fly excited-state quantum mechanics/molecular mechanics molecular dynamics (QM/MM-MD) simulations of thymine in aqueous solution are performed to investigate the role of solvent water molecules on the nonradiative deactivation process. The complete active space second-order perturbation theory (CASPT2) method is employed for a thymine molecule as the QM part in order to provide a reliabl...