defined:

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.

explained:

Listen to a detailed explanation.

Dr. Robert Nussbaum, formerly of the National Human Genome Research Institute's Laboratory of Genetic Disease Research, defines adenine.

illustrated:

View illustration

related
terms:

base pair, deoxyribonucleic acid (DNA), ribonucleic acid (RNA), protein, genetic code (ATGC), nucleotide, uracil, thymine, guanine

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