Guanine

Guanine is one of the five main nucleobases found in the nucleic acids DNA and RNA.

The others are adenine, cytosine, thymine, and uracil. With the formula C5H5N5O, guanine is a derivative of purine. 

 Basic principles 
Guanine, along with adenine and cytosine, is present in both DNA and RNA, whereas thymine is usually seen only in DNA and uracil only in RNA. 

 References 
 Miyakawa, S., Murasawa, K., Kobayashi, K., Sawaoka, AB. "Abiotic synthesis of guanine with high-temperature plasma." Orig Life Evol Biosph. 30(6): 557-66, Dec. 2000.
 Horton, H.R., Moran, L.A., Ochs, R.S., Rawn, J.D., Scrimgeour, K.G. "Principles of Biochemistry." Prentice Hall (New Jersey). 3rd Edition, 2002.
 Lister, J.H. "Part II Purines." The Chemistry of Heterocyclic Compounds. Wiley-Interscience (New York). 1971.

 Other websites 
 Computational Chemistry Wiki 
 Good Guanine reference

Category:DNA
Category:Aminopurines