| − | '''Thymine''' is one of the four bases in [[DNA]] that make up the letters ATGC, thymine is the "T". The others are [[adenine]], [[guanine]], and [[cytosine]]. Thymine always pairs with adenine. | + | '''Thymine''' is one of the four bases in [[DNA]] that make up the letters ATGC, thymine is the "T". The others are [[adenine]], [[guanine]], and [[cytosine]]. Thymine always pairs with adenine. In [[RNA]], thymine pairs with [[uracil]]. |