CHAC1 siRNA treatment does not affect the expression of CHOP, ATF3, or BiP. Determination of normalized mRNA levels by real-time RT-PCR of (a) CHAC1, (b) CHOP, (c) ATF3, and (d) BiP following transfection with CHAC1-specific siRNA vs scrambled control in HAEC that were untreated (media) vs treated with ox-PAPC (ox) or Tunicamycin (Tun). *, p < 0.01.