text: …chlorophenolicus A6L (chromosomally tagged with the firefly luciferase gene, luc) (A6L) (Elväng et al. 2001) and A. chlorophenolicus T99, a mutant with a transposon insertion in a gene encoding a hydroxyquinol dioxygenase, resulting in an inability to grow on or degrade 4-CP (Nordin et al. 2005).