Measuring spectroscopy and magnetism of extracted and intracellular magnetosomes using soft X-ray ptychography Journal Articles uri icon

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  • SignificanceMagnetotactic bacteria are one of the simplest systems that perform biomineralization: organisms that create inorganic materials using biochemistry under genetic control. They synthesize magnetosomes, which are intracellular, membrane-bound nanoscale single crystals of magnetite, a magnetic iron oxide. We studied the magnetism of individual magnetosomes inside individual cells with spectro-ptychography, a new technique of high-resolution X-ray microscopy. Our results help us to understand how the cells biomineralize magnetosomes and their function in the cell ecophysiology. In addition to demonstrating a large improvement in spatial resolution relative to earlier nonptychography studies, the results presented provide insights into magnetosome biomineralization.


  • Zhu, Xiaohui
  • Hitchcock, Adam Percival
  • Bazylinski, Dennis A
  • Denes, Peter
  • Joseph, John
  • Lins, Ulysses
  • Marchesini, Stefano
  • Shiu, Hung-Wei
  • Tyliszczak, Tolek
  • Shapiro, David A

publication date

  • December 20, 2016