On Apr 12, 2013, at 8:49 AM, Muhammad Ali wrote:

sir When I retrieve a ligand structure in SDF files from PDB site, it contains many ligand, how to get a single ligand ??? also ligand files are why not available in PDB files ?? I have to covert them in Chimera.....

Please see previous answer to same question: <http://plato.cgl.ucsf.edu/pipermail/chimera-users/2013-April/008702.html>