DOPAL interferes with antibody recognition of TH in a concentration-dependent manner. PC6-3 cell lysate as positive control (Lane 1), Bovine serum albumin (BSA) as a negative control (Lane 2), Lysate treated with 10 μM DOPAL (Lane 3), 50 μM DOPAL (Lane 4), and 100 μM DOPAL (Lane 5) % Control refers to integrated staining density for tyrosine hydroxylase (60 kDa). ** Control values represent the mean ± SEMs (n = 3), figure represents an example of gel analysis.