Predicted carotenoid biosynthetic pathway based on the annotated genome of N. aromaticivorans. Reactions predicted to be present in wild-type N. aromaticivorans (13, 15) are shown as full arrows and include the genes predicted to code for the enzymes involved. Reactions predicted to occur in strains in which crtG has been replaced in the genome with a crtW gene are shown as dashed arrows. DMAPP, dimethylallyl pyrophosphate; IPP, isopentenyl diphosphate; GPP, geranyl diphosphate; FPP, farnesyl diphosphate; and GGPP, geranylgeranyl pyrophosphate.