|               Kit contents            50 Reactions
 
 
        Guanidination Reagent                                      0.4ml         (O-methylisoureahydrogen sulfate salt solution)         Guanidination Buffer                                            1ml         (Ammonium hydroxide solution)         Sulfonation Reagent                                      2 × 2mg         (4-Sulfophenyl isothiocyanate)         Sulfonation Buffer                                                1ml 
 Procedure Summary
 
 
 
        1. In-gel guanidination (optional)         2. Trypsin digestion3. Sulfonation
 4. Cleaning of modified peptides
 
 
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