1.17.9.1 EC 1.17.99.1 formerly 1.17.9.1 additional information consists of a c-type cytochrome subunit PchC and two flavoprotein subunits PchF 1.17.9.1 p-cresol methylhydroxylase, p-cresol-(acceptor) oxidoreductase (hydroxylating), p-cresolmethylhydroxylase, para-cresol methylhydroxylase, pchC, pchF, PCMH - 1.17.9.1 p-cresol methylhydroxylase A 2 enzyme forms with various MW and Km are formed during growth on 3,5-xylenol - hydroxylase A - and 4-cresol - hydroxylase B 1.17.9.1 p-cresol methylhydroxylase B 2 enzyme forms with various MW and Km are formed during growth on 3,5-xylenol - formation of hydroxylase A - and on 4-cresol - formation of hydroxylase B