The absorbance was then measured at 405 nm and the corresponding total protein was determined and used to normalize the absorbance. The tyrosinase activity was determined based on the amount of DOPA chrome produced in response to the use of various substrates, including L-tyrosine and L-DOPA. To assess this, 100 μL of supernatants and 100 μL of 12.5 mM L-DOPA
were then mixed and incubated at 37oC for 30 min. The absorbance was then measured at 475 nm and the corresponding total protein was determined and used to normalize the absorbance.