Multiple Assemblies exist for SMTL entry 4kx6
Plasticity of the quinone-binding site of the complex II homolog quinol:fumarate reductase; X-RAY DIFFRACTION 2.95 Å

	SMTL ID 4kx6.1 Ligands FLAVIN-ADENINE DINUCLEOTIDE; FE2/S2 (INORGANIC) CLUSTER; FE3-S4 CLUSTER; IRON/SULFUR CLUSTER; MENAQUINONE-7 Polypeptides Fumarate reductase flavoprotein subunit; Fumarate reductase (Anaerobic), Fe-S subunit; Fumarate reductase subunit C; Fumarate reductase subunit D Oligo-state hetero-1-1-1-1-mer
	SMTL ID 4kx6.2 Ligands FLAVIN-ADENINE DINUCLEOTIDE; FE2/S2 (INORGANIC) CLUSTER; FE3-S4 CLUSTER; IRON/SULFUR CLUSTER; MENAQUINONE-7 Polypeptides Fumarate reductase flavoprotein subunit; Fumarate reductase (Anaerobic), Fe-S subunit; Fumarate reductase subunit C; Fumarate reductase subunit D Oligo-state hetero-1-1-1-1-mer