When applications of certain purines and pyrimidines enhanced the development or maintenance of cold hardiness, the content of water-soluble, trichloroacetic acid-precipitable protein and nucleic ...

American Journal of Botany, Vol. 52, No. 9 (Oct., 1965), pp. 900-910 (11 pages) The purine analogs, 8-azaadenine, 8-azaguanine, 8-azaxanthine and 8-azahypoxanthine, and the pyrimidine analogs, ...

Nucleotides are essential to all life on Earth as they form the building blocks of DNA or RNA, and understanding how they were first made is a long-standing challenge that must be resolved to ...

A METHOD was recently developed in this laboratory by which it was possible to degrade DNA chemically to sequences of purine nucleotides 1,2. During this procedure the DNA is first freed of ...

This image illustrates the chemical structures of the five main nucleobases found in DNA and RNA. The pyrimidines, thymine (DNA), uracil (RNA), and cytosine are shown on top while the purines, adenine ...

This image illustrates the chemical structure of a purine molecule, highlighting the numbering of the carbon and nitrogen atoms. The purine structure consists of a pyrimidine ring (positions 1 to 6) ...