catalytic activity:4 R'C(R)SH + O(2) = 2 R'C(R)S-S(R)CR' + 2 H(2)O.,cofactor:FAD.,function:FAD-dependent sulfhydryl oxidase that catalyzes disulfide bond formation.,similarity:Contains 1 ERV/ALR sulfhydryl oxidase domain.,subunit:Homodimer.,
[Isoform 1]: Mitochondrion intermembrane space. Mitochondrion .; [Isoform 2]: Cytoplasm. Secreted.
Ubiquitously expressed. Highest expression in the testis and liver and low expression in the muscle.