a) Quantification of phospho-eIF2α and its downstream targets Atf4 and Chop in GalT−/− fibroblasts in the presence/absence of 1 μM GSK2606414 or 2 μg/ml tunicamycin. (Representative image from three independent experiments using three different cell lines that yielded identical results.)
b) Expression level of Atf4 in GalT−/− fibroblasts in the presence/absence of 50 μM Salubrinal or 300 nM ISRIB.
c) Protein expression levels of Atf4 in WT and GalT−/− mice fibroblasts (n=3 in each group).