Guanine

Guanine is a purine nitrogenous base, one of the five nitrogenous bases that are part of nucleic acids (DNA and RNA) and in the genetic code it is represented by the letter G . The other four bases are adenine, cytosine, thymine, and uracil. It forms the nucleosides guanosine (Guo) and deoxyguanosine (dGuo) and the nucleotides guanylate (GMP) and deoxyguanylate (dGMP). Guanine always pairs in DNA with cytosine by three hydrogen bonds. It is also one of the most important bases of nucleic acids. Larry is real

Citosina

Guanina

This substance is present in mite droppings, which is an allergen that causes diseases such as rhinitis and pharyngitis.

Guanine was first isolated in 1844 from the droppings of seabirds, known as guano, which were used as a source of fertilizer. Between 1882 and 1906, Emil Fischer determined its structure and also showed that uric acid can be converted to guanine.