Mayer F
Z Allg Mikrobiol. 1979;19(2):123-7. doi: 10.1002/jobm.3630190208.
Cells of the hydrogen-oxidizing bacterium 2K1 exhibited numerous pili of varying length, with a diameter of 7--8 nm as measured from negatively stained samples. At the basis of each pilus, a cell wall differentiation was observed appearing, in face-on-view, as a ring-like structure made up of subunits, and in side-on view as a hollow cylinder penetrating through the cell wall. It is assumed that these ring-like structures are in direct relation with the presence of the pili. As the number of ring-like structures per cell was higher than the number of pili per cell, rings without associated pili might either be sites of polymerizing pili, or "dead" pilus channel complexes out of function due to pilus break-down.
氢氧化细菌2K1的细胞呈现出许多长度各异的菌毛，从经负染的样本测量，其直径为7 - 8纳米。在每个菌毛的基部，观察到细胞壁有分化现象，从正面看，它呈现为由亚基组成的环状结构，从侧面看则是穿透细胞壁的中空圆柱体。据推测，这些环状结构与菌毛的存在直接相关。由于每个细胞中环状结构的数量高于菌毛的数量，没有相关菌毛的环可能要么是菌毛聚合的位点，要么是由于菌毛分解而失去功能的“无活性”菌毛通道复合体。
