(B-C) Schematic representations of TFE3 binding region in the ATF4 promoter in MEF cells treated with Tunicamycin (0.1 µg/ml) for 16 h (B) or starved in EBSS for 2 h (C). The distance upstream from the Transcription Start Site (TSS) of a potential E-box sequence is indicated in base pair (bp). 