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. 2003 Sep;69(9):5410–5413. doi: 10.1128/AEM.69.9.5410-5413.2003

FIG. 2.

FIG. 2.

Proposed pathway of 4-aminophenol metabolism in Burkholderia sp. strain AK-5 and comparison to the metabolic pathways of aniline and aniline derivatives. (a) Proposed pathway of 4-aminophenol metabolism. I, 4-aminophenol; II, 1,4-benzenediol; III, 1,2,4-trihydroxybenzene; IV, maleylacetic acid. (b) Metabolic pathways of aniline and aniline derivatives in Rhodococcus erythropolis AN-13 (2), Pseudomonas putida mt-2 (12), Moraxella sp. strain G (24), and Hydrogenophaga palleronii S5 (4). I, aniline (R = H), p-toluidine (R = CH3), 4-chloroaniline (R = Cl), 4-aminobenzoic acid (R = COOH), and 4-aminobenzenesulfonic acid (R = SO3H); II, 1-amino-2-hydrodiols; III, catechol (R = H), 4-methylcatechol (R = CH3), 4-chlorocatechol (R = Cl), protocatechuic acid (R = COOH), and 4-sulfocatechol (R = SO3H).