adenine
基礎(chǔ)科學(xué)

        One of the four major bases found in nucleic acids. Adenine and guanine are purines; cytosine,thymine,and uracil are pyrimidines. These nitrogenous bases are a component of the basic building blocks of nucleic acids called nucleotides. Within the DNA doub......（本文共 365 字）     [閱讀本文] >>