QSOX1 encodes the human gene, Quiescin sulfhydryl oxidase 1. It may also be known as: Sulfhydryl oxidase 1; Quiescin Q6; hQSOX; thiol oxidase 1; Q6; QSCN6; quiescin Q6 sulfhydryl oxidase 1. The encoded protein is an enzyme with an amino acid length of 747 and a mass of 82.6 kDa. QSOX1 is a member of the Quiescin-sulfhydryl oxidase (QSOX) family. Homologs of this gene exist in other organisms, including: Mouse, Arabidopsis.