Amber8 Module: ptraj 

 ASN  LEU  TYR  ILE  GLN  TRP  LEU  LYS  ASP  GLY 
 GLY  PRO  SER  SER  GLY  ARG  PRO  PRO  PRO  SER 
Successfully completed readParm.

PTRAJ: Processing input file...
       Input is from standard input

PTRAJ: trajin equil9.mdcrd.gz 2455 2455

PTRAJ: trajout lowest_energy_struct.pdb pdb

PTRAJ: Successfully read the input file.
       Coordinate processing will occur on 1 frames.
       Summary of I/O and actions follows:

INPUT COORDINATE FILES
  File (equil9.mdcrd.gz) is an AMBER trajectory with 2455 sets (processing only 1)

OUTPUT COORDINATE FILE
  File (lowest_energy_struct.pdb) is a PDB file

ACTIONS
  Stack is NULL

Processing AMBER trajectory file equil9.mdcrd.gz

Set      1                                                  
Set     50                                                  
Set    100                                                  
Set    150                                                  
Set    200                                                  
Set    250                                                  
Set    300                                                  
Set    350                                                  
Set    400                                                  
Set    450                                                  
Set    500                                                  
Set    550                                                  
Set    600                                                  
Set    650                                                  
Set    700                                                  
Set    750                                                  
Set    800                                                  
Set    850                                                  
Set    900                                                  
Set    950                                                  
Set   1000                                                  
Set   1050                                                  
Set   1100                                                  
Set   1150                                                  
Set   1200                                                  
Set   1250                                                  
Set   1300                                                  
Set   1350                                                  
Set   1400                                                  
Set   1450                                                  
Set   1500                                                  
Set   1550                                                  
Set   1600                                                  
Set   1650                                                  
Set   1700                                                  
Set   1750                                                  
Set   1800                                                  
Set   1850                                                  
Set   1900                                                  
Set   1950                                                  
Set   2000                                                  
Set   2050                                                  
Set   2100                                                  
Set   2150                                                  
Set   2200                                                  
Set   2250                                                  
Set   2300                                                  
Set   2350                                                  
Set   2400                                                  
Set   2450     .

PTRAJ: Successfully read in 2455 sets and processed 1 sets.
       Dumping accumulated results (if any)