VAN ITERSON W, ROBINOW C F
J Biophys Biochem Cytol. 1961 Jan;9(1):171-81. doi: 10.1083/jcb.9.1.171.
The nuclei of two spherical bacteria have been examined in electron micrographs of thin sections of specimens prepared by the method of Ryter and Kellenberger (1958). The nuclei appear to consist of the same fine fibers in a matrix of low density which have already been seen in many other bacteria prepared by the same procedure. They are worth a separate description because their constituent fibers are arranged in patterns of uncommon orderliness. In the nuclei of one of the two bacteria this is seen at all times, in the nuclei of the other one only at the beginning of the growth cycle. In some places the diameter of the nuclear fibers is close to that of the DNA molecule in the model of Watson and Crick (1953).
通过Ryter和Kellenberger（1958年）的方法制备的标本薄片的电子显微照片中，对两个球形细菌的细胞核进行了检查。细胞核似乎由低密度基质中的相同细纤维组成，这些细纤维在通过相同程序制备的许多其他细菌中已经见过。它们值得单独描述，因为其组成纤维以不寻常的有序模式排列。在两种细菌之一的细胞核中，这种情况在任何时候都能看到，而在另一种细菌的细胞核中，只有在生长周期开始时才能看到。在某些地方，核纤维的直径接近Watson和Crick（1953年）模型中DNA分子的直径。
