Concentrations of PAHs in abiotic controls and cultures of strain AP1 after 60 days of incubation in nutrient-supplemented artificial seawater and fuel. N, naphthalene; Fl, fluorene; P, phenanthrene; Ant, anthracene; Ft, fluoranthene; Py, pyrene; DBT, dibenzothiophene; BaA, benzo(a)anthracene; C, chrysene. C1, C2, and C3 indicate the numbers of methyl groups.