乙型肝炎患者血浆中的病毒,主要有三种微粒构造,每种都带有病毒基因所编码的特殊抗原因子。其中一种称为丹氏粒(Dane Particle),其大小为42毫微米,球状。最近作者从这种丹氏粒中提出DNA,并作成两种含此DNA片段的E.Coli克隆:一种是用BamHI切DNA,得到2100和1100两条碱基片段,将其中2100一段接到PBR322质粒 The viruses in the plasma of hepatitis B patients are mainly composed of three microparticle constructs, each with a special antigenic factor encoded by the viral gene. One of them, called Dane Particle, is 42 nanometers in size and spherical. Recently, the authors proposed DNA from this Danish grain and made two E. coli clones containing this DNA fragment. One was to cut the DNA with BamHI to give two base fragments of 2100 and 1100, one of which was received in 2100 PBR322 plasmid