Class II fumarases, found in prokaryotes as well as in eukaryotes, are tetrameric enzymes of 200,000 D that contain three distinct segments of significantly homologous amino acids.
As fumarases de clase II, que se encontran tanto en procariotas coma en eucariotas, son encimas tetraméricos de 200.000 D que conteñen tres segmentos distintos con secuencias de aminoácidos significativamente homólogas.