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Abstract The fungal metabolite Brefeldin A (BFA) disrupts the Golgi apparatus and its incoming protein flux. We developed a genetic approach to identify yeast proteins involved in the protein transport step that BFA blocks. The BFR2 gene (YDR299W) was thus isolated as a high-copy suppressor of the growth defects induced by BFA in a sensitive strain of Saccharomyces cerevisiae. Although BFR2 over-expression...