Comparison of tetH gene cluster (A) and the sox gene clusters (B) between A. thiooxidans A01 and other sulfur oxidizers containing identified or putative genes. Abbreviations: tpase, transposase; rsrR, response regulator (two-component system); rsrS: histidine kinase (two-component system); tetH, tetrathionate hydrolase; doxD, thiosulfate:quinone oxidoreductase; hyp, hypothetical protein; resB, cytochrome c-type biogenesis protein ResB; resC, cytochrome c-type biogenesis protein ResC. The tetH cluster in AT: A. thiooxidans A01, AC: A. caldus SM-1 (CP002573); Two sox clusters in AT: A. thiooxidans A01, AC: A.caldus SM-1 (CP002573), TD: T. denitrificans ATCC 25259 (CP000116). The homology proteins are expressed by the same color, and percentage of amino acid similarity is indicated. The direction of transcription is represented by the arrows.