A purine that is one of the five main bases found in nucleic acids. Guanine base pairs with cytosine.
one of the bases which contains nitrogen. It participates in the formation of the nucleic acids DNA and RNA in animal and plant cells. It is often abbreviated to G.
one of the four nitogenous bases in DNA and RNA that make up the letters ATGC, guanine is the "G". The others are adenine, cytosine, and thymine. Guanine always pairs with cytosine Bird droppings form the guano deposits on Gardner pinnacles, Northwestern Hawaiian Islands. (Photo: NOAA)
a purine base bound to the pyrimidine cytosine in double strand DNA.