MRC file format specifications

This information is copied from http://ami.scripps.edu/prtl_data/mrc_specification.htm

The MRC file header is of 1024 bytes long, organized as 56 LONG words followed by space for 10 80 byte text labels. The full specification, listed in Table 1, is abstracted from the image2000 Announcement of the MRC Image Processing package by Crowther et al., which is currently freely available to academic workers. Use of the programs is described in published papers which are referred to in the publication “Crowther, Henderson and Smith, J. Struct. Biol. (1996) 116, 9-16.”

For further information about the MRC file format and MRC Image Processing package which includes routines to read/write MRC image and to convert to some other formats, you may contact Jude Short at jms@mrc-lmb.cam.ac.uk.

For the more adventuresome, two Matlab functions are provided in Table 2 for reading/writting our MRC image files written here ami@scripps.edu.