Secondary structure analysis of the dissimilatory sulphite reductase in Desulfovibrio desulfuricans

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The complete sequences of the dsrA and dsrB genes coding for the α- and β-subunits, respectively, of the sulphite reductase enzyme in Desulfovibrio desulfuricans were determined. Analyses of the amino acid sequences indicated a number of serohaem/Fe4S4 binding consensus sequences whilst predictive secondary structure analysis revealed a similar pattern of α-helix and β-strand structures between the two subunits which was indicative of gene duplication.

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