Figure 3.
Gls1 is not efficiently packaged into COPII vesicles. In vitro budding reactions were performed with microsomes from WT (CBY740) and gls1Δ (CBY1086) strains in the absence (−) or presence (+) of purified COPII components. Membranes from one tenth of the total reaction (T) and vesicle fractions were collected by centrifugation, resolved on 10.5% polyacrylamide gels, and immunoblotted for Gls1, Erv41, and Erv46 as well as the ER resident protein, Yet3, as a negative control.