VAN ITERSON W
J Biophys Biochem Cytol. 1961 Jan;9(1):183-92. doi: 10.1083/jcb.9.1.183.
In thin sections of Bacillus subtilis certain organelles are observed situated either in the nuclear area from where they can extend into the cytoplasm, or in contact with the cell wall. Inside the nuclear area, the organelle is sometimes composed of concentric layers each seen to consist of two dense borders with a lighter interspace. In other instances, inside as well as outside the nuclear area, the organelles appear as clusters of delicately delimited vesicles. A typical site of occurrence is on the inner rim of the centripetally developing transverse septa, where it appears as a so called peripheral body (2). The micrographs strongly suggest that when the organelles are attached to the walls they have a function in cell wall formation.
在枯草芽孢杆菌的薄片中，可以观察到某些细胞器位于核区，它们可以从核区延伸到细胞质中，或者与细胞壁接触。在核区内，细胞器有时由同心层组成，每层看起来都由两个致密边界和一个较浅的间隙组成。在其他情况下，在核区内外，细胞器表现为界限清晰的小泡簇。一个典型的出现部位是向心发育的横向隔膜的内边缘，在那里它表现为所谓的周缘体（2）。显微照片强烈表明，当细胞器附着在细胞壁上时，它们在细胞壁形成中起作用。
