1-6Cu chaperones / Cu-binding proteins translocationApical sideSTEAPMetalloreductaseBasolateral sideCu(I)Cu import, chaperones and exportMTsSOD1ATOX1GSK3BCOX17SCO1SCO2MT1FMTF2XAF1MT4MT3BACE1APCMT1BFOXO3SLC11A2MTF1MT1EMAPTFOXO1MT1XATP7APRNPSTEAP3PIK3CAATP7BCPHL1PMT1AMT1JPTP53STEAP2SLC31A1SOD3JUNAKTADAM10MT1GSTEAP4MT1LSLC31A2CCND1COMMD1APPCASP3COX11MT1HCCSSP1ADAM17ADAM9PTENMT2AMDM2XIAPSTEAP1APPCu(I)COX17ATP7BATP7ACu(I)STEAP3STEAP4SLC31A1Cu(I)Cu(I)Cu(II)Cu(I)Cu(I)Cu(I)Cu(I)ATOX1