This volume presents methods related to the role of anaerobic dissimilatory cycles and sulfur metabolism. Key Features @bul* Sulfate Transport * Dissimilatory Sulfate Metabolism * Dehydrogenases * Hydrogenases from sulfate-reducing bacteria * Electron carrier protein sulfate-reducing bacteria * Terminal reductases of sulfate-reducing bacteria molecular biology * Dissimilatory sulfur reduction * Oxidation of reduction compounds * Metabolism of polythinates * Special techniques