HEK293T cells were transfected with the pCMV6-ENTRY control (Cat# PS100001, Left lane) or pCMV6-ENTRY GTF2B (Cat# RC204607, 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-GTF2B (Cat# TA808602)(1:2000). Positive lysates [LY400582] (100 ug) and [LC400582] (20 ug) can be purchased separately from OriGene.