COX7A2L and Behcet disease: Another important data emerging from our research is that treatment with BD increased the expression of proteins associated with the structural organization of the mitochondrial respiratory chain, among these, succinate dehydrogenase assembly factor (Sdhaf1), which facilitates the assembly of complex II,42 and Cox7a2l protein, involved in the stabilization of complexes III and IV, by promoting their supramolecular organization in III2 + IV supercomplex.43