Hi Chimera users, I am sure there is a simple way to do this, but I need some help. I want to add CONECT records to a pdb file, given that the input file contains all necessary atom coordinate information. I need to do this within my shell script and I want to start chimera using the nongui option. Now, doing some google seach brought up this solution to add CONECT records (in the command line within CHIMERA gui) pdbrun nouser conect cat > filename.pdb where filename.pdb is the name of the output file with CONECT records added. the above mentioned command works when I pull up the file on GUI CHIMERA My question is then how would I use such a command when I want to use it in the nogui option. I have multiple files (>100) for which I need to add CONECT records and I want to do it with a script. Also, if someone could point me to a good resource for writing python scripts that can be then passed on to chimera, I would be grateful. Thanks, Shyamala Shyamala Iyer Graduate Student Department of Microbiology PO BOX 357242 University of Washington Seattle, WA, 98195