(D) Effect of latrunculin B or benomyl on COPII vesicle formation, followed through the subcellular localization Sec24-GFP. Notice that 40 min of latrunculin B led to loss of the wild-type punctuate appearance of Sec24 cytoplasmic puncta and the appearance of a diffuse fluorescent haze in the cytoplasm. In contrast, benomyl treatment did not affect the wild-type punctuate localization of Sec24. Scale bar: 5 μm. 