In a dna molecule , the base adenine sticks to thymine , and guanine pairs with cytosine .
腺嘌呤与胸腺嘧啶结合在一起，鸟嘌呤则和胞嘧啶结合成一对。
Thymidine the nucleoside formed when thymine is linked to d-ribose by a b-glycosidic bond .
胸腺嘧啶脱氧核苷：胸腺嘧啶与d-核糖以β-糖苷键相连而形成的核苷。
Thymine or thymine nucleotide concentration was all disqulified .
胸腺嘧啶或胸腺嘧啶核苷均不合格。
An international team of researchers has now succeeded in generating a bacterium possessing a dna in which thymine is replaced by the synthetic building block 5-chlorouracil , a substance toxic for other organisms .
