Kübler O, Baumeister W
Cytobiologie. 1978 Jun;17(1):1-9.
The hexagonally packed interlayer (HPI-layer) from Micrococcus radiodurans cell walls has been studied by electron microscopy and subsequent digital image processing. The most prominent feature in the average images is a "complex" shaped like a "toothed wheel", which is perforated by a central pore and interconnected by fine spokes. This basic structural element is tentatively interpreted to represent the bulk of HPI-layer protein, intercalated by the other constituents: lipids, carotenoids and carbohydrates. It is suggested that the "toothed wheel" structure is a quite common element of periodic bacterial surface layers and that the different spacings observed with various species are due to variable amounts of intercalating material.
通过电子显微镜和后续的数字图像处理，对耐辐射微球菌细胞壁的六方堆积中间层（HPI层）进行了研究。平均图像中最显著的特征是一个形状像“齿轮”的“复合体”，它有一个中心孔，由细辐条相互连接。这个基本结构元素被初步解释为代表HPI层蛋白质的主体，被其他成分：脂质、类胡萝卜素和碳水化合物插入。有人提出，“齿轮”结构是周期性细菌表面层相当常见的元素，不同物种观察到的不同间距是由于插入物质的量不同。
