2F-Peracetyl-fucose is an inhibitor of protein fucosylation. It inhibits fucosylation of IgG1 monoclonal antibodies produced by CHO-DG44 cells when used at a concentration of 50 µM. It reduces intracellular GDP-fucose levels in CHO-DG44 cells in a concentration-dependent manner. 2F-Peracetyl-fucose (100 µM) also decreases intracellular fucose levels in A. thaliana seedlings. 2F-Peracetyl-fucose decreases root length in A. thaliana seedlings in a concentration-dependent manner.