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   54 NATAA R                   
 A    2   55 NATAA K                   
 A    3   56 NATAA A                   
 A    4   57 NATRO P                   
 A    5   58 NATAA S                   
 A    6   59 NATAA R                   
 A    7   60 NATAA D                   
 A    8   61 NATAA E                   
 A    9   62 NATRO P                   
 A   10   63 NATRO C                   
 A   11   64 NATAA S                   
 A   12   65 NATAA S                   
 A   13   66 NATAA T                   
 A   14   67 NATAA S                   
 A   15   68 NATAA R                   
 A   16   69 NATRO P                   
 A   17   70 NATAA A                   
 A   18   71 NATAA L                   
 A   19   72 NATAA E                   
 A   20   73 NATAA E                   
 A   21   74 NATAA D                   
 A   22   75 NATAA V                   
 A   23   76 NATAA I                   
 A   24   77 NATAA Y                   
 A   25   78 NATAA H                   
 A   26   79 NATAA V                   
 A   27   80 NATAA K                   
 A   28   81 NATAA Y                   
 A   29   82 NATAA D                   
 A   30   83 NATAA D                   
 A   31   84 NATAA Y                   
 A   32   85 NATRO P                   
 A   33   86 NATAA E                   
 A   34   87 NATAA N                   
 A   35   88 NATAA G                   
 A   36   89 NATAA V                   
 A   37   90 NATAA V                   
 A   38   91 NATAA Q                   
 A   39   92 NATAA M                   
 A   40   93 NATAA N                   
 A   41   94 NATAA S                   
 A   42   95 NATAA R                   
 A   43   96 NATAA D                   
 A   44   97 NATAA V                   
 A   45   98 NATAA R                   
 A   46   99 NATAA A                   
 A   47  100 NATAA R                   
 A   48  101 NATAA A                   
 A   49  102 NATAA R                   
 A   50  103 NATAA T                   
 A   51  104 NATAA I                   
 A   52  105 NATAA I                   
 A   53  106 NATAA K                   
 A   54  107 NATAA W                   
 A   55  108 NATAA Q                   
 A   56  109 NATAA D                   
 A   57  110 NATAA L                   
 A   58  111 NATAA E                   
 A   59  112 NATAA V                   
 A   60  113 NATAA G                   
 A   61  114 NATAA Q                   
 A   62  115 NATAA V                   
 A   63  116 NATAA V                   
 A   64  117 NATAA M                   
 A   65  118 NATAA L                   
 A   66  119 NATAA N                   
 A   67  120 NATAA Y                   
 A   68  121 NATAA N                   
 A   69  122 NATRO P                   
 A   70  123 NATAA D                   
 A   71  124 NATAA N                   
 A   72  125 NATRO P                   
 A   73  126 NATAA K                   
 A   74  127 NATAA E                   
 A   75  128 NATAA R                   
 A   76  129 NATAA G                   
 A   77  130 NATAA F                   
 A   78  131 NATAA W                   
 A   79  132 NATAA Y                   
 A   80  133 NATAA D                   
 A   81  134 NATAA A                   
 A   82  135 NATAA E                   
 A   83  136 NATAA I                   
 A   84  137 NATAA S                   
 A   85  138 NATAA R                   
 A   86  139 NATAA K                   
 A   87  140 NATAA R                   
 A   88  141 NATAA E                   
 A   89  142 NATAA T                   
 A   90  143 NATAA R