Daer chimera team, I am interested in finding a channel in a toluene hydrogenase, and extracting all the residues / atoms surrounding this channel. To do that I calculated the channel itself using the 3V voxelator (http://3vee.molmovdb.org), which produces a volume object that can be imported to chimera. See for example the output page http://3vee.molmovdb.org/viewResults.php?jobid=10sep02.ee6, which provides the file channel-004.mrc.gz, which needs to be first unzipped. When uploaded to chimera the volume is very clear and nice. But I want to find the residues/ atoms that form the channel, one the pdb itself 3DHG.pdb.gz, although the select and zone features seem to not work with the volume object. Any idea how to do that? Thanks a lot, Fabian -- ------------------------------------------------------ Fabian Glaser, PhD Bioinformatics Knowledge Unit, The Lorry I. Lokey Interdisciplinary Center for Life Sciences and Engineering Technion - Israel Institute of Technology Haifa 32000, ISRAEL E-mail: fglaser@technion.ac.il Tel: +972-4-8293701 Fax: +972-4-8225153