只有4种：腺嘌呤、胸腺嘧啶、鸟嘌呤和胞核嘧啶。
There are just four kinds: adenine, thymine, guanine and cytosine.
然而，干细胞里四分之一的甲基胞核嘧啶却没有鸟嘌呤随后。
A quarter of the methylated cytosines in stem cells, however, were not followed by guanines.
而在基因的启动子区域里它们的影响和甲基胞核嘧啶正相反。
They also had the opposite effect from methylated cytosines found in promoter regions.
它们可以附在胞核嘧啶上，胞核嘧啶是组成基因代码的“字母”的四种碱基数之一，帮助调控转录的过程。
These can attach themselves to cytosine , one of the four chemical bases that form the "letters" of the genetic code.
他们的第一个发现是:干细胞比肺细胞更多甲基化 -相对4.3%而言, 它有5.8%的 胞核嘧啶.
Their first discovery was that the stem cells were more methylated than the lung cells—5.8% of cytosines, compared with 4.3%.
此外, 造成它们的差别的主要原因却很奇怪,先前的研究显示,甲基胞核嘧啶通常在鸟嘌呤(G)字母的旁边.
Moreover, the difference was largely accounted for by something strange. Previous studies have shown that methylated cytosines are usually next to a letter called guanine (G).
此外, 造成它们的差别的主要原因却很奇怪,先前的研究显示,甲基胞核嘧啶通常在鸟嘌呤(G)字母的旁边.
Moreover, the difference was largely accounted for by something strange. Previous studies have shown that methylated cytosines are usually next to a letter called guanine (G).
应用推荐