You run it in the Terminal (if you've never used it, search for it in Spotlight). Create a file like this (below), make sure it is executable (chmod +x filename_here), and run it (./filename_here). #!/bin/sh -e sc XYZIN your.pdb SCRADII ./sc_radii.lib <<eof MOLECULE 1 CHAIN A MOLECULE 2 CHAIN B END eof The "SCRADII ./sc_radii.lib" part is unnecessary if you only have amino acid residues in your structure. Disclaimer: Haven't run sc and tested this code in a while, but should at least help you get started. The CCP4 webpage should also have examples. Engin On 9/29/15 9:38 AM, NISHANT SINGH wrote: > > Hi Everyone, > > > I am using CCP4i 6.5.017 on an imac. I want to us the shape > complementarity (sc) for my complex. I looked on line and on the CCP4 > website, it says that sc is a CCP4 supported program, but I can't find > it anywhere. I have looked through the entire program list. Am i > missing something? Please help. > > > Sincerely, > > Nishant Kumar Singh -- Engin Özkan, Ph.D. Assistant Professor Dept of Biochemistry and Molecular Biology University of Chicago Phone: (773) 834-5498 http://ozkan.uchicago.edu