purine

Tanımlar (İngilizce)

1. isim Any of a class of organic heterocyclic compounds, composed of fused pyrimidine and imidazole rings, that constitute one of the two groups of organic nitrogenous bases (the other being the pyrimidines) and are components of nucleic acids.

   “For example, for purine-pyrimidine and for pyrimidine-purine base steps the presence of purines on opposite strands in successive base pairs sterically restricts the conformations that these base pairs can adopt relative to each other.”