Anti-Human IgA, AlpSdAbs VHH(HRP) is designed for detecting human IgA specifically. Anti-Human IgA, AlpSdAbs VHH(HRP) is based on monovalent, recombinant single domain antibody to human IgA coupled to HRP. Based on immunoelectrophoresis and/or ELISA, Anti-Human IgA, AlpSdAbs VHH(HRP) reacts with human IgA chain selectively, no reactivity with human IgG, IgE, IgM, IgD.