由两种形态不同的纤维组成，包括铁细菌扭曲的菌柄。

Department of Material Chemistry, Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan.

Microbes Environ. 2012;27(3):338-41. doi: 10.1264/jsme2.me11340. Epub 2012 Mar 28.

Two morphologically distinct extracellular stalk fibers produced by Gallionella ferruginea were compared by electron microscopy and elemental analysis. The thick- and fine-fiber stalks were different in structure on a micrometer scale and in the site on the mother cell to which they were attached, but on a nanometer scale they were similar in ultrastructure and in the elemental composition of their basic fiber matrix.

铁柄杆菌产生的两种形态截然不同的细胞外菌毛纤维，通过电子显微镜和元素分析进行了比较。粗菌毛纤维和细菌毛纤维在微米尺度上的结构以及与母细胞连接的位置不同，但在纳米尺度上，它们在超微结构和基本纤维基质的元素组成上是相似的。