1.8.4.8 Metabolic pathways - 01100 1.8.4.8 Microbial metabolism in diverse environments - 01120 1.8.4.8 Sulfur metabolism - 00920 1.8.4.8 assimilatory sulfate reduction I - - 1.8.4.8 assimilatory sulfate reduction IV - - 1.8.4.8 sulfate reduction sulfate reduction -