There are just four kinds : adenine, thymine, guanine and cytosine. 只有4种:腺嘌呤、胸腺嘧啶、鸟嘌呤和胞核嘧啶。
Researchers at Purdue University used synthetic forms of guanine and cytosine. 美国普渡大学的研究人员使用的是合成的鸟嘌呤与胞嘧啶。
DNA random access memory takes circular single-stranded DNA as storing matter and uses four nitrogenous bases ( Adenine, Guanine, Cytosine and Thymine ) to code data. DNA随机存储器以环状单链DNA分子为存储介质,以4种碱基(腺嘌呤adenine、鸟嘌呤guanine、胞嘧啶cytosine和胸腺嘧啶thymine)对信息进行编码;
Determination of Guanine and Cytosine Contents of Trichophyton Rubrum Nuclear DNA with the Thermal Denaturation Technique 热变性法测定红色毛癣菌核中DNA鸟嘌呤加胞嘧啶含量的研究
Analysis of Guanine plus Cytosine Content in Rhizobium DNA 根瘤菌DNA中G+C含量的分析