This file specifies which residues will be varied
                                                  
 Column   2:  Chain                               
 Column   4-7:  sequential residue number         
 Column   9-12:  pdb residue number                
 Column  14-18: id  (described below)             
 Column  21-40: amino acids to be used            
                                                  
 NATAA  => use native amino acid                  
 ALLAA  => all amino acids                        
 NATRO  => native amino acid and rotamer          
 PIKAA  => select inividual amino acids           
 POLAR  => polar amino acids                      
 APOLA  => apolar amino acids                     
                                                  
 The following demo lines are in the proper format
                                                  
 A    1    3 NATAA                                
 A    2    4 ALLAA                                
 A    3    6 NATRO                                
 A    4    7 NATAA                                
 B    5    1 PIKAA  DFLM                          
 B    6    2 PIKAA  HIL                           
 B    7    3 POLAR                                
 -------------------------------------------------
 start
 A    1    1 NATAA M                   
 A    2    2 NATAA D                   
 A    3    3 NATAA E                   
 A    4    4 NATAA D                   
 A    5    5 NATAA A                   
 A    6    6 NATAA T                   
 A    7    7 NATAA I                   
 A    8    8 NATAA T                   
 A    9    9 NATAA Y                   
 A   10   10 NATAA V                   
 A   11   11 NATAA D                   
 A   12   12 NATAA D                   
 A   13   13 NATAA D                   
 A   14   14 NATAA K                   
 A   15   15 NATAA G                   
 A   16   16 NATAA G                   
 A   17   17 NATAA A                   
 A   18   18 NATAA Q                   
 A   19   19 NATAA V                   
 A   20   20 NATAA G                   
 A   21   21 NATAA D                   
 A   22   22 NATAA I                   
 A   23   23 NATAA V                   
 A   24   24 NATAA T                   
 A   25   25 NATAA V                   
 A   26   26 NATAA T                   
 A   27   27 NATAA G                   
 A   28   28 NATAA K                   
 A   29   29 NATAA T                   
 A   30   30 NATAA D                   
 A   31   31 NATAA D                   
 A   32   32 NATAA S                   
 A   33   33 NATAA T                   
 A   34   34 NATAA T                   
 A   35   35 NATAA Y                   
 A   36   36 NATAA T                   
 A   37   37 NATAA V                   
 A   38   38 NATAA T                   
 A   39   39 NATAA I                   
 A   40   40 NATRO P                   
 A   41   41 NATAA D                   
 A   42   42 NATAA G                   
 A   43   43 NATAA Y                   
 A   44   44 NATAA E                   
 A   45   45 NATAA Y                   
 A   46   46 NATAA V                   
 A   47   47 NATAA G                   
 A   48   48 NATAA T                   
 A   49   49 NATAA D                   
 A   50   50 NATAA G                   
 A   51   51 NATAA G                   
 A   52   52 NATAA V                   
 A   53   53 NATAA V                   
 A   54   54 NATAA S                   
 A   55   55 NATAA S                   
 A   56   56 NATAA D                   
 A   57   57 NATAA G                   
 A   58   58 NATAA K                   
 A   59   59 NATAA T                   
 A   60   60 NATAA V                   
 A   61   61 NATAA T                   
 A   62   62 NATAA I                   
 A   63   63 NATAA T                   
 A   64   64 NATAA F                   
 A   65   65 NATAA A                   
 A   66   66 NATAA A                   
 A   67   67 NATAA D                   
 A   68   68 NATAA D                   
 A   69   69 NATAA S                   
 A   70   70 NATAA D                   
 A   71   71 NATAA N                   
 A   72   72 NATAA V                   
 A   73   73 NATAA V                   
 A   74   74 NATAA I                   
 A   75   75 NATAA H                   
 A   76   76 NATAA L                   
 A   77   77 NATAA K                   
 A   78   78 NATAA H                   
 A   79   79 NATAA G