A nucleoside containing the pentose sugar ribose and the purine base adenine. When a phosphate group is attached to the 5′ carbon in the ribose,the nucleoside becomes a nucleotide,a basic building block of nucleic acids. 一種含有核糖和腺嘌呤堿基的核苷。當核糖的5′碳原子與磷酸......（本文共 241 字）     [閱讀本文] >>