Availability of cryo-volume imaging services facilitated through installation of high-resolution cryo-pFIB/SEM microscope at CEITEC Masaryk University

30 Oct 2024

Cryo-electron microscopy core facility at CEITEC MUNI has finished installation of a new focused ion beam scanning electron microscope (FIB/SEM). BioHydra (ThermoScientific, Helios Hydra V) is equipped with an immersion SEM optics for high-resolution SEM imaging under room-temperature and cryogenic conditions and FIB working on the principle of inductively-couple plasma with a four gas (Xe,Ar,O,N) source for efficient material ablation. The instrument was proven to deliver 3D reconstruction of whole eukaryotic cells or parts of a tissue preserved at near-native state at resolution better than 30nm. Thus, BioHydra will provide the CIISB user community access to the cryo-volume imaging technology which is rapidly developing over the last few years and extend the capacity of cellular lamellae preparation for in situ structural biology studies by cryo-electron tomography. The installation of BioHydra microscope was made possible through the "Innovation of Czech Infrastructure for Integrative Structural Biology" grant, funded by the OP JAK for Research Infrastructures I.

Preparation of the high-pressure frozen eukaryotic cell suspension for cryo-volume imaging (left). A detail of an cryo-SEM image from the reconstruction of pancreatic INS-1 cells shows high-resolution details of cellular ultrastructure (right).

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