|  
         Substance 
       | 
       
         pH 
       | 
       
         lmax(nm) 
       | 
       
         e(liter/cm*mole) 
       | 
    
|  
         Phenylalanine 
       | 
       
         6 
       | 
       
         257 
       | 
       
         200 
       | 
    
|  
         Tyrosine 
       | 
       
         6 
       | 
       
         275 
       | 
       
         1,300 
       | 
    
|  
         Tryptophan 
       | 
       
         6 
       | 
       
         280 
       | 
       
         5,000 
       | 
    
|  
         Adenosine-5'-phosphate 
       | 
       
         7 
       | 
       
         259 
       | 
       
         15,000 
       | 
    
|  
         Cytidine-5'-phoosphate 
       | 
       
         7 
       | 
       
         271 
       | 
       
         9,000 
       | 
    
|  
         Uridine-5'-phosphate 
       | 
       
         7 
       | 
       
         262 
       | 
       
         10,000 
       | 
    
|  
         Guanosine-5'-phosphate 
       | 
       
         7 
       | 
       
         252 
       | 
       
         14,000 
       |