Anti-Human IgA, AlpSdAbs® VHH is designed for detecting human IgA specifically. Anti-Human IgA, AlpSdAbs® VHH is monovalent, recombinant single domain antibody derived from the variable regions of heavy chain of Alpaca pacous. Based on immunoelectrophoresis and/or ELISA, Anti-Human IgA, AlpSdAbs® VHH reacts with human IgA selectively, no reactivity with human IgG, IgD, IgM, IgE. 6*his tag and one cys were added at the C terminal of the VHH