Talk:Structural Biochemistry/Nucleic Acid/Nitrogenous Bases/Purines

Purines are not nucleotides, but rather are bases. Nucleotide = nitrogenous base + sugar (ribose or deoxyribose) + phosphate. In addition, it is incorrectly stated that the structure of a purine is that of a cyclohexane and a cyclopentane. By definition, these are cycloalkanes meaning they are saturated (no double bonds). Overall, this writing needs a bit of cleaning up so as not to sound like an essay written by a first-year chemistry student (although a pretty smart one =) just needs some minor adjustments!). Mari.K_372 (discuss • contribs) 18:15, 21 March 2017 (UTC)