Abstract
Pseudomonas ATCC 17483 produced enzymes for naphthalene metabolism when growing in a medium containing succinate and naphthalene. Mutants for naphthalene metabolism produced by treatment with N-methyl-N''-nitro-N-nitrosoguanidine were able to produce these enzymes only when the metabolic pathway was intact as far as salicylaldehyde, which was therefore identified as the 1st possible inducer.