No (apparent) defect in eIF2a(P) in As-Rx’d HRI-/- MEFs UT Tg15’ Tg30’ Tg60’ A s15 ’ As30 ’ A s60’ UT Tg15’ Tg30’ Tg60’ A s15’ A s30’ A s60’ HRI-/- #3 WT #7 eIF2a(P) eIF2a(T) UT Tg15’ Tg30’ Tg60’ As15’ As30’ As60’ UT Tg15’ Tg30’ Tg60’ A s15’ A s30’ As60’ HRI-/- #5 WT #11 Isabel Novoa & Yuhong Zhang As: Sodium arsenite, 100M, Tg: Thapsigargin, 100nM