Birgid Schlindwein's

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Nitrogenous base A nitrogen-containing molecule having the chemical properties of a base. See purine and pyrimidine.
Related Terms:
Purine A nitrogen-containing, double-ring, basic compound (cf. nitrogenous base) that occurs in nucleic acids. The purines in DNA and RNA are adenine and guanine.

purine structure 7 H-Purine

Pyrimidine A nitrogen-containing, single-ring, basic compound (cf. nitrogenous base) that occurs in nucleic acids. The pyrimidines in DNA are cytosine and thymine. The pyrimidines in RNA are cytosine and uracil.

pyrimidine structure

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Programming: Herbert Maier
Database: Birgid Schlindwein. Please contact me if you encounter any mistakes or if you are missing anything
© Dr. Birgid B. Schlindwein
last update of the database 10/01/2006