Figure 4.
Gene structure diagrams of selected HCOH proteins. Genes are shown as arrows. HCOH-s1 genes, three-EU HCOH genes, and HCO/NOR genes are shown as red arrows, cyan arrows, and blue arrows, respectively. Names of frequently occurring domains are shown below the genes. Numbers of omitted genes are shown in brackets. Domain name abbreviations are as follows: cp2, cupin_2 domain; cyC, cytochrome c; fx, iron-sulfur ferredoxin domain; HCO: heme-copper oxidase; hemr, hemerythrin domain; N2O_reductase, nitrous oxide reductase; Nitrate_red, nitrate reductase; Nitrite_red, nitrite reductase; NOD, nitric oxide dioxygenase; NOR, nitric oxide reductase; and Trx, thioredoxin.