| Dye | 
  Labeling Mode | 
  Linear Regression [protein concentration (M) vs. peak height] | 
  Correlation Coefficient | 
  Limit of Detection (M) | 
    
   
  |  
    bis-SQHN-4d           | 
  on-column | 
  y =1.00 x 10-9x + 117 | 
  0.9998 | 
  3.42 x 10-8 | 
    
   
  | pre-column | 
  y=2.93x + 0.0018 | 
  0.9996 | 
  8.70 x 10-7 | 
    
   
  | SQHN-3c | 
  on-column | 
  y =256000x – 118000 | 
   0.9997 | 
   0.216 x 10-6 | 
    
   
  |   | 
   
   |