Figure 2. Nonstop ER membrane proteins are differently affected by the proteasomal inhibitor MG132.

(A,B) Whole cell extracts prepared from yeast cells expressing the indicated nonstop (A) or stop (B) membrane proteins from the GPD1 promoter with or without MG132 treatments (100 μM for 1.5 h). (C) Quantification of the levels of nonstop membrane proteins with and without MG132 treatments. The protein levels without MG132 treatments were set to 100%. Error bars represent SD (n = 3).