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Comparison of site enrichments by substrate, demonstrating the shift of predominant bands from the first enrichment (A) to the third enrichment (C). For site P16, the A enrichment for naphthalene did not amplify (no DGGE gel). (i) Site L enrichments. (ii) Site P16 enrichments. (iii) Site RC enrichments. PAHs are indicated as follows: F, fluoranthene; Ph, phenanthrene; Py, pyrene; N, naphthalene.
