Purified Penicillium notatum catalase was devoid of any peroxidatic activity toward guaiacol or o-dianisidine, however, it oxidized o-dihydroxyphenols (catechol, 4-methylcatechol, pyrogallol, dopa, dopamine, gallic acid, and adrenaline). The K m for dopa, catechol, and 4-methylcatechol was 1.5,...
The effect of hydroxylamine (NH2OH), p-aminobenzoic acid (PABA) and p-aminosalicylic acid (PASA) on the spectrum of the final product (s) formed when o-dihydroxy- and trihydroxyphenols were oxidized by tyrosinase was examined. New pigmented product(s), probably oximes, were formed by the ...