Bacterial Enzymes and Their Role in Decolorization of Azo Dyes - Microbial Degradation of Synthetic Dyes in Wastewaters - page 153

(a)

HO 3 S S

N

N

N

N

S

SO 3 H

(b)

-e

HO 3 S S

N

N

N

N

S SO 3 H

(c)

-e

HO 3 S S

N

N

N

N

S

SO 3 H

Fig. 6 Reaction catalyzed by laccases. a ABTS; b Intermediate ABTS radical; c Oxidized form of
ABTS

Fig. 7 Reaction catalyzed by
polyphenol oxidase.
a L-tyrosine; b o-quinone

(a) (b)

O O

O O

H 3 N CH H 3 N CH

CH 2 CH 2

OH

OH OH