Fig. 1

a, b, c coating antigens of α-LA, β-LG and LF were 2 mg/mL, 1 mg/mL, 0.5 mg/mL, 0.2 mg/mL, 0.1 mg/mL, respectively; d anti-α-LA were 1:200, 1:500, 1:1000, 1:2000 dilution respectively; e anti-β-LG were 1:5000, 1:10,000, 1:20,000, 1:40,000 dilution respectively; f anti-LF were 1:5000, 1:10,000, 1:20,000, 1:40,000 dilution respectively; g second antibodies of AgNPs labeled donkey anti-goat IgG were 1:25, 1:50, 1:100, 1:200 dilution respectively for α-LA, β-LG and LF