Bacteria involved in sulfur metabolism. WangHai-liang ZhangJian SunQing-lei LianChao SunLi 2017 <p>(A) Sulfur-oxidizing bacteria (SOB). (B) Sulfur-reducing bacteria (SfurRB). (C) Sulfate-reducing bacteria (SfatRB). (D) Relative abundances of SOB, SfurRB, and SfatRB in the four samples.</p>