Cryogenic electron microscopy (cryo-EM) is a cryomicroscopy technique applied on samples cooled to cryogenic temperatures. CTFFIND CTFFIND and CTFTILT are two programs for finding CTFs of electron micrographs. CryoSPARC CryoSPARC server request EMAN2 greyscale scientific image processing suite EMReady manage cryo-EM maps