Figure 1.

Gene clusters of enzymes potentially involved in inorganic sulfur compound (ISC) metabolism as well as gene clusters of terminal oxidases and the NADH quinone-oxidoreductase complex as predicted by bioinformatic analysis of the A. caldus genome sequence (A). Suggested model for ISC metabolism in A. caldus(B). Abbreviations: sox, sulfur oxidation system; doxD, thiosulfate:quinol oxidoreductase; tth, tetrathionate hydrolase; hdr, heterodisulfide reductase; sqr, sulfide quinone reductase; sor, sulfur oxygenase reductase; hyp, hypothetical protein; caf, cytochrome oxidase assembly factor; ftr, heme O synthase, protoheme IX farnesyltranferase; g6pi, glucose 6-p isomerase; mfs, major facilitator superfamily protein; atrp, putative amino acid transporter; matr, putative malic acid transporter; blac, beta lactamase; tpase, transposase; tchq, two component system – histidine quinase; rtc, two component system – response regulator.