Western blot analysis of extracts from 293T cells, mock transfected (-) or transfected with constructs expressing Myc/DDK-tagged full-length human PSMB5 (hPSMB5-Myc/DDK; +) and Myc/DDK-tagged full-length human PSMB8 (hPSMB8-Myc/DDK; +), using PSMB5 Antibody (upper) or DYKDDDDK Tag Antibody #2368 (lower).