Anti-Rat IgG (Fab Fragment specific), AlpSdAbs® VHH is designed for detecting rat IgG fab fragment specifically. Anti-Rat IgG (Fab Fragment specific), AlpSdAbs® VHH is recombinant single domain antibody derived from the variable regions of heavy chain of Alpaca pacous. Based on immunoelectrophoresis and/or ELISA, Anti-Rat IgG (Fab Fragment specific), AlpSdAbs® VHH reacts with rat IgG fab fragment selectively, no reactivity with mouse IgG, rabbit IgG, goat IgG, human IgG. 6*his tag and one cys were added at the C terminal of the VHH.