Detail of Figs 3C and 3D, in the vicinity of the proteorhodopsin gene. A) homologous fragments that passed the best-hit, and B) syntenic fragments. Regions of blue on the fragments indicate gaps. Only syntenic fragments containing 3 or more genes are shown. (SMRP) small multi-drug resistance protein, (ACAS) acyl-coenzyme A synthetase, (FD) ferrodoxin, (TD) thioredoxin disulfide reductase, (GST) glutathione S-transferase, (DKS) DnaK suppressor protein.