Multiple Assemblies exist for SMTL entry 2fbw
Avian respiratory complex II with carboxin bound; X-RAY DIFFRACTION 2.06 Å

SMTL ID 2fbw.1 Ligands FLAVIN-ADENINE DINUCLEOTIDE; (~{Z})-2-oxidanylbut-2-enedioic acid; POTASSIUM ION; AZIDE ION; UNKNOWN LIGAND; FE2/S2 (INORGANIC) CLUSTER; IRON/SULFUR CLUSTER; FE3-S4 CLUSTER; SODIUM ION; GLYCEROL; PROTOPORPHYRIN IX CONTAINING FE; 2-METHYL-N-PHENYL-5,6-DIHYDRO-1,4-OXATHIINE-3-CARBOXAMIDE; octyl beta-D-glucopyranoside Polypeptides Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial; Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial; Succinate dehydrogenase cytochrome b560 subunit, mitochondrial; Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial Oligo-state hetero-1-1-1-1-mer

SMTL ID 2fbw.2 Ligands FLAVIN-ADENINE DINUCLEOTIDE; (~{Z})-2-oxidanylbut-2-enedioic acid; POTASSIUM ION; AZIDE ION; GLYCEROL; UNKNOWN LIGAND; FE2/S2 (INORGANIC) CLUSTER; IRON/SULFUR CLUSTER; FE3-S4 CLUSTER; PROTOPORPHYRIN IX CONTAINING FE; 2-METHYL-N-PHENYL-5,6-DIHYDRO-1,4-OXATHIINE-3-CARBOXAMIDE; UNDECYL-MALTOSIDE; octyl beta-D-glucopyranoside Polypeptides Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial; Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial; Succinate dehydrogenase cytochrome b560 subunit, mitochondrial; Succinate dehydrogenase [ubiquinone] cytochrome b small subunit, mitochondrial Oligo-state hetero-1-1-1-1-mer