...知来数据 Key words: alfalfa, purines, purine derivatives, microbial protein synthesis) [gap=459]关键词：紫花苜蓿，嘌呤，嘌呤衍生物，微生物蛋白质的合成） ...
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methyl purines 甲基嘌呤
edogenous purines 内原性嘌呤
substituted purines 取代嘌呤
Purines Low Meal 低嘌呤餐
Salvage of Purines and Pyrimidines 嘌呤与嘧啶的回收途径
8-substituted purines 取代嘌呤核苷
Some substitution groups are introduced to 2,6,8-substitue of purines, Thus, these purines have the biomedicine activity of antiviral, anticancer and dropping blood pressure.2,6,8-purinetrithiol was obtained by using methyl cyanacetate as starting material via five steps reaction of cyclization, nitrosylation, reduction, closed ring action and thionation. 4-amino-6-hydroxy-2-mercapto-pyrimidine was prepared from methy1 cyanacetate by the reactions of cyclization, adding sodium methylate and thiourea to it.
在嘌呤环的2，6或8位碳上引入某些取代基团后，所得的嘌呤衍生物具有抗病毒，抗癌和降血压等的生物医学活性。
参考来源 - 2，6，8·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
N a colourless crystalline solid that can be prepared from uric acid. Formula: C5H4N4 嘌呤
Adenine and guanine are purines and cytosine and thymine are pyrimidines.
腺嘌呤和鸟嘌呤是嘌呤和胞嘧啶和胸腺嘧啶是嘧啶。
In fact PNA - DNA duplexes show significantly increased stability when the purines are in the PNA strand.
事实上，当嘌呤存在于肽核酸的链上时，肽核酸- DNA二聚体的稳定性会大大增加。
The most abundant bases are cytosine, thiamine, and uracil (pyrimidines) and adenine and guanine (purines).
最丰富的碱基是胞嘧啶，胸腺嘧啶，尿嘧啶，腺嘌呤和鸟嘌呤。
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