Moyne G, Harper F, Saragosti S, Yaniv M
C R Seances Acad Sci III. 1981 Mar 23;292(12):749-54.
The mild dissociation of SV40 virus particles at pH 7.5 yields a nucleoprotein complex containing all the capsid proteins and histones of the intact virion. Electron microscopic observations show a bead-on-a-string structure comprising about 70 particles 7 nm in diameter along the viral DNA. No particle of nucleosome size was visible. The compaction of DNA in this complex is lower than 2 and is likely to be close to unity.
SV40病毒颗粒在pH 7.5时轻度解离，产生一种核蛋白复合物，其中包含完整病毒体的所有衣壳蛋白和组蛋白。电子显微镜观察显示，沿着病毒DNA有一个串珠状结构，由大约70个直径为7纳米的颗粒组成。未观察到核小体大小的颗粒。该复合物中DNA的压缩率低于2，可能接近1。
