Anti-Human IgG (Fcγ fragment specific), AlpSdAbs® VHH (Biotin) is designed for detecting human IgG Fcγ fragment specifically. Anti-Human IgG (Fcγ fragment specific), AlpSdAbs® VHH (Biotin) is based on monoclonal, recombinant single domain antibody to human IgG Fc coupled to Biotin, and Anti-Human IgG (Fcγ fragment specific), AlpSdAbs® VHH (Biotin) reacts with the Fc fragment of human IgG heavy chain but not with the Fab portion of human IgG., . . . .