Western blot anlaysis of extracts from 293T cells, either mock transfected (-) or transfected with Myc/DDK-tagged cDNA expression constructs encoding full-length human RNF40 (hRNF40, +) and full-length human RNF20 (hRNF20, +), using RNF40 Antibody (upper) and DYKDDDDK Tag Antibody (Binds to same epitope as Sigma's Anti-FLAGĀ® M2 Antibody) #2368 (lower).