1.3.1 electron microscopy electron microscopy electron microscopy electron microscopy electron microscopy electron microscopy 2020-10-29 2022-05-24 false 2020-10-29 81c628f1-5365-4517-ae99-a6bdcc65ba24 cryoet cryotem cryoelectron tomography scanning electron microscope electron cryotomography electron cryomicroscopy 38063808