Fig. 3.

Alignment of naphthalene 1,2-dioxygenase-related 2Fe-2S reductase component protein sequences involved in the biodegradation of PAH compounds. Sequences have been retrieved from the GenBank (NCBI). GenBank accession numbers are given in parentheses. Amino acids marked with an asterisk have consensus through the investigated sequences. Variations in the target sequence are shown with gray shading and in bold letters. Sequence sections shown in green and blue represent the 3′ degenerate core of the forward and reverse primers, respectively. Red and orange colors represent the 5′ consensus clamps