HEK293T cells were transfected with the pCMV6-ENTRY control (Cat# PS100001, Left lane) or pCMV6-ENTRY DDB1 (Cat# RC208372, Right lane) cDNA for 48 hrs and lysed. Equivalent amounts of cell lysates (5 ug per lane) were separated by SDS-PAGE and immunoblotted with anti-DDB1 antibody (Cat# TA890041). Positive lysates [LY419658] (100ug) and [LC419658] (20ug) can be purchased separately from OriGene.