EMSA performed with the FT2 footprint of the ATR is bound by Oct-1 factor present in MEL and Jurkat extracts.

The FT2B competitor contains a mutation in the Oct-1 consensus site, antibodies used in supershift experiments are indicated. M indicates MEL extract; J, Jurkat extract; Inc, length (in minutes) of incubation of extract and antibody prior to addition of EMSA probe; o/n, overnight.