Veratryl alcohol, o-tolidine, dichloroindophenol (DCIP),
catechol, n-propanol, and tartaric acid, were obtained from SRL Chemicals (India). 2,
2-Azinobis (3-ethylbenzothiazolin-6-sulfonic acid) (ABTS) and NADH were
purchased from Sigma Chemical Company (USA). All other chemicals were of
highest purity and of an analytical grade.