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                             ptrace command
                        Leif Laaksonen CSC 1996
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#
# Command to trace atoms (particle trace)
#
# Select the atoms to include in the trace set
# toggle between the display on/off states
#

ptra$ce  atom$s     Segment Residue Atom [appe$nd]
        -ato$ms     
         disp$lay   on
                    off

#
# Write a probesurface input file using the traced
# atoms. This can be used to see the volume movable
# atoms cover during a simulation.
#

         write      prob$esurf  File.Name

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LUL/1996
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