Thymine definition

Thymidine consists of thymine + deoxyribose by definition and is abbreviated dT by definition deoxythymi-dine would imply a different compound lacking another oxygen. 

Despite great efforts put forth by experimentalists, the exact identity of most radical products generated in irradiated DNA is still unknown. The first ESR studies on fuU DNA only provided evidence for the formation of a thjonine centered radical [54,55]. Work performed on DNA irradiated by ultraviolet light [56] and on oriented fibers [57] confirmed this radical to be formed through net hydrogen atom addition to C6 in thymine [T(C6H)]. The definitive... 

Additional complications may arise in some cases when nn excitations are involved in photoreactions, and the main mechanism is not so clear. For definiteness, take two rather popular molecular systems, thymine and coumarin. In the former. So Si transition is of nn nature, whereas in the latter is of jtjt nature. With this. So -> Ti is the nn transition for both molecules. The photodimerization is possible for both the systems [54, 85]. There are various viewpoints on the mechanism of the photoreactions (compare [85] and [86]), but, in our opinion. 

Prior to the definitive experiments of Friedkin and Komberg (see below), early tracer studies with orotate and with nucleoside derivatives of uracil and cytosine had demonstrated that the pyrimidine ring of DNA thymine could be derived from these compounds. In addition, it had become apparent that the methyl group of thymine was derived from one-carbon units at the oxidation level of formaldehyde rather than at the oxidation level of formate formaldehyde and the hydroxymethyl group... 

We have seen that the macromolecule of DNA is a double helix in the form of a spiral staircase in which the links between the different nucleic adds form the banisters 2uid the purine and pyrimidine bases form the steps. As we have seen, each step is formed hy one of the two combinations adraiine-thymine (or thymine-adenine) and guanine-cytosine (or cytosine-guanine). This means that a particular sequence of bases on one of the banisters is paired to one definite complementary sequence on the other. 

In addition to the commonly found bases, 2-methyladenine, 6-methyl-aminopurine 6-dimethylaminopurine, and small but definite amounts of thymine have been isolated from chemically degraded RNA (14 ). Degradation of yeast RNA by alkaline hydrolysis and ribonuclease has revealed the existence of a nucleoside whose structure appears to be... 

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