is one of the four bases in DNA that make up the letters ATGC, adenine is the "A". The others are guanine, cytosine, and thymine. Adenine always pairs with thymine.
A purine (nitrogenous base) found in DNA and RNA; forms base pairs with thymine (A-T) and uracil (A-U).
a purine base that codes for heredity information in RNA and DNA
A white, finely crystalline alkaloid, usually obtained from tea by extraction or from uric acid by synthesis, used chiefly in medicine. One of four nucleotides which are the primary bulling blocks for DNA.