toluate 1,2-dioxygenase and carboxyl- ate dehydrogenase from the TOL path- way to degrade 4-chlorobenzoate and transform methylbenzoates into meth- yl-2-enelactones (strain FR1),
(2) 4-methyl-2-enelactone isomerase from Ralstonia eutropha (formerly Alcali- genes eutrophus) JMP134 to transform 4-methyl-2-enelactones to 3-methyl-2- enelactones to complete the o-pathway for 4-methylbenzoate [strain FR1(pRFC20P)],
(3) phenol hydroxylase from B13 to miner- alize chloro- and methylphenols (cres- ols) to corresponding catechols [strain FR1(pFRC20P)-1].