PMID- 37502891 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230904 DP - 2023 Jul 12 TI - Integrated Fluorescence Microscopy (iFLM) for Cryo-FIB-milling and In-situ Cryo-ET. LID - 2023.07.11.548578 [pii] LID - 10.1101/2023.07.11.548578 [doi] AB - Correlative cryo-FLM-FIB milling is a powerful sample preparation technique for in situ cryo-ET. However, correlative workflows that incorporate precise targeting remain challenging. Here, we demonstrate the development and use of an integrated Fluorescence Light Microscope (iFLM) module within a cryo-FIB-SEM to enable a coordinate-based two-point 3D correlative workflow. The iFLM guided targeting of regions of interest coupled with an automated milling process of the cryo-FIB-SEM instrument allows for the efficient preparation of 9-12 approximately 200 nm thick lamellae within 24 hours. Using regular and montage-cryo-ET data collection schemes, we acquired data from FIB-milled lamellae of HeLa cells to examine cellular ultrastructure. Overall, this workflow facilitates on-the-fly targeting and automated FIB-milling of cryo-preserved cells, bacteria, and possibly high pressure frozen tissue, to produce lamellae for downstream cryo-ET data collection. FAU - Yang, Jae AU - Yang J AD - Department of Biochemistry, University of Wisconsin, Madison, WI USA. AD - Midwest Center for Cryo-Electron Tomography, Department of Biochemistry, University of Wisconsin, Madison, WI USA. FAU - Vrbovska, Veronika AU - Vrbovska V AD - Thermo Fisher Scientific Brno, Brno, Czech Republic. FAU - Franke, Tilman AU - Franke T AD - Thermo Fisher Scientific Brno, Brno, Czech Republic. FAU - Sibert, Bryan AU - Sibert B AD - Department of Biochemistry, University of Wisconsin, Madison, WI USA. AD - Cryo-Electron Microscopy Research Center, Department of Biochemistry, University of Wisconsin, Madison, WI USA. AD - Midwest Center for Cryo-Electron Tomography, Department of Biochemistry, University of Wisconsin, Madison, WI USA. FAU - Larson, Matthew AU - Larson M AD - Department of Biochemistry, University of Wisconsin, Madison, WI USA. AD - Cryo-Electron Microscopy Research Center, Department of Biochemistry, University of Wisconsin, Madison, WI USA. AD - Midwest Center for Cryo-Electron Tomography, Department of Biochemistry, University of Wisconsin, Madison, WI USA. FAU - Hall, Alex AU - Hall A AD - Thermo Fisher Scientific Brno, Brno, Czech Republic. FAU - Rigort, Alex AU - Rigort A AD - Thermo Fisher Scientific Brno, Brno, Czech Republic. FAU - Mitchels, John AU - Mitchels J AD - Thermo Fisher Scientific Brno, Brno, Czech Republic. FAU - Wright, Elizabeth R AU - Wright ER AD - Department of Biochemistry, University of Wisconsin, Madison, WI USA. AD - Cryo-Electron Microscopy Research Center, Department of Biochemistry, University of Wisconsin, Madison, WI USA. AD - Midwest Center for Cryo-Electron Tomography, Department of Biochemistry, University of Wisconsin, Madison, WI USA. AD - DOE Great Lakes Bioenergy Research Center, University of Wisconsin, Madison, WI USA. AD - Morgridge Institute for Research, Madison, WI, USA. LA - eng GR - R01 GM114561/GM/NIGMS NIH HHS/United States GR - U24 GM139168/GM/NIGMS NIH HHS/United States PT - Preprint DEP - 20230712 PL - United States TA - bioRxiv JT - bioRxiv : the preprint server for biology JID - 101680187 UIN - Microsc Microanal. 2023 Jul 22;29(Supplement_1):1055-1057. PMID: 37613109 PMC - PMC10369943 EDAT- 2023/07/28 06:43 MHDA- 2023/07/28 06:44 PMCR- 2023/07/26 CRDT- 2023/07/28 04:24 PHST- 2023/07/28 06:44 [medline] PHST- 2023/07/28 06:43 [pubmed] PHST- 2023/07/28 04:24 [entrez] PHST- 2023/07/26 00:00 [pmc-release] AID - 2023.07.11.548578 [pii] AID - 10.1101/2023.07.11.548578 [doi] PST - epublish SO - bioRxiv [Preprint]. 2023 Jul 12:2023.07.11.548578. doi: 10.1101/2023.07.11.548578.