| Enzyme | Unit | Definition | Conversions | 
      
        | Dispase CHNP Thermolysin | Azocasein Units (AUC) | One AUC catalyzes an A440 equivalent to 1mg/mL of azocasein per mL per minute at 37°C
 
 
 | 1 Dispase Unit = 181
           
          Protease Units (PU) | 
      
        | Neutral Protease Units (NPU)
 | An increase of 1 fluorescent unit per minute at 35°CBSAfromconjugatethecleava. | 
      
        | Protease units (PU) | One protease unit catalyzes the hydrolysis of casein to produce color equivalent to 1.0 µmole tyrosine per min at pH 7.5 at    37°C.
 | 
      
        | Dispase Unit | One dispase unit catalyzes the hydrolysis of casein to produce 181 µmole tyrosine per min at pH 7.5 at 37°C.
 | 
      
        | DMC-U units | One DMC-U catalyzes the cleavage of 1 μmole of peptide bonds    from dimethyl case in (DMC), at  25°C,    pH 7.0 | 
      
        | Caseinase Units | One caseinase unit will hydrolyze casein to produce color equivalent to 1.0 µmole (181 µg) of  tyrosine per 5 hours at pH 7.5 at 37°C
 |