The original EMPIAR-10291 (15.9 GB) contains 300 mrc files, each of them has 3710 x 3838 x 1 (#MRC_MODE 2 "32-bit signed real').
First, we checked a distribution of _rlnCtfFigureOfMerit #8 and _rlnCtfMaxResolution #9, and cofirmed it has a single-peak distribution. Then, we decided to choose good micrographs only by MaxResolution.
We have organized two workshops using this tutorial data
The images stored as EMPIAR-10248 collected on JEOL CRYO ARM 300, provides a very high resolution (1.54 angstrom) 3D density map for apo ferritin. However, this data is not good for educational workshops and exercises because analyzing this data set (145.9 Gbyte) requires large computational costs. We therefore provide a reduced data set (1.7 Gbyte) for an educational purpose.
Procedure to reduce image data