• bash (or zsh/ksh) users should:

. /Applications/ccp4-8.0/bin/ccp4.setup-sh

  • but if you use tcsh (or csh) then instead:

source /Applications/ccp4-8.0/bin/ccp4.setup-csh

  • then issue the commands:

echo $CCP4
/Applications/ccp4-8.0
mtzdmp $CCP4/examples/rnase/rnase18.mtz | grep Space
Spacegroup information obtained from library file:
* Space group = P 21 21 21 (number 19)