Anti-GFP, AlpHcAbs Mouse antibody is designed for detecting GFP fusion protein specifically. Anti-GFP, AlpHcAbs Mouse antibody is monovalent, recombinant fab of alpaca IgG1 antibody fused to Mouse IgG2a Fc. Based on immunoelectrophoresis and/or ELISA, Anti-GFP, AlpHcAbs Mouse antibody is useful for detecting GFP fusion proteins with high sensitivity.