2. Alpha and beta proteins (a+b)
  3. Ferredoxin-like
  4. Nitrite/Sulfite reductase N-terminal domain-like
  5. Duplicated SiR/NiR-like domains 1 and 3

Duplicated SiR/NiR-like domains 1 and 3 Family

Domain Species Proteins
Sulfite reductase, domains 1 and 3 1 24
Ferredoxin--nitrite reductase, NIR 1 2
Sulfite reductase NirA 1 8