Indirect ELISA of Com. Vs Inhouse fgf23 by Burozumab 1. 2. 3. 4. Coating: Full-length fgf23 (w/o His tag, (Abcam): 2 µg/mL Coating inhouse fgf23 (uncleaved sumo his tag): 2 µg/mL 1st Ab: Burosumab(AMW1) 9 µg/mL (3 serial dilution down) 2nd Ab: Goat anti-Human (H+L) HRP (1:10,000) 1st Thawing Commercial fgf23 0.900 1.000 0.800 0.900 In-house fgf23 0.800 0.700 0.700 450 0.600 450 0.500 0.600 0.500 0.400 0.400 0.300 0.300 0.200 0.200 0.100 0.100 0.000 1E-005 0.000 1E-005 0.0001 0.001 0.01 0.1 1 Concentration Commercial fgf23. EC50 = 0.0466 10 0.0001 0.001 0.01 0.1 1 10 Concentration In-house sumo fgf23. EC50 = 0.0562 ELISA analysis 1. 2. 3. 4. 2nd Thawing: start making aliquot Coating: Full-length fgf23 (w/o His tag, (Abcam): 2 µg/mL Coating inhouse fgf23 (uncleaved sumo his tag): 2 µg/mL 1st Ab: Burosumab(AMW1) 9 µg/mL (3 serial dilution down) 2nd Ab: Goat anti-Human (H+L) HRP (1:10,000) IgG std.120509 Inhouse truncated fgf23 0.800 1.600 0.700 1.400 0.600 1.200 0.500 1.000 450 450 std.120509 CommercialIgGfull-length fgf23 0.400 0.800 0.300 0.600 0.200 0.400 0.100 0.200 0.000 1E-005 0.000 0.0001 0.001 0.01 0.1 <Plate Layout Settings> Concentration Commercial fgf23. EC50 = 0.096 1 10 1E-005 0.0001 0.001 0.01 0.1 <Plate Layout Settings> Concentration Inhouse fgf23. EC50 = 0.051 1 10 ELISA analysis 1. 2. 3. 4. Coating: Full-length fgf23 (w/o His tag, (Abcam): 2 µg/mL Coating inhouse fgf23 (uncleaved sumo his tag): 2 µg/mL 1st Ab: Burosumab(AMW1) 9 µg/mL (3 serial dilution down) 2nd Ab: Goat anti-Human (H+L) HRP (1:10,000) 3rd Thawing IgG std.120509 Commercial full-length fgf23 IgG std.120509 Inhouse truncated fgf23 1.100 1.200 1.000 1.000 0.900 0.800 0.800 450 450 0.700 0.600 0.600 0.500 0.400 0.400 0.300 0.200 0.200 0.100 1E-005 0.000 0.0001 0.001 0.01 0.1 Concentration <Plate Layout Settings> Commercial fgf23. EC50 = 290 1 10 1E-005 0.0001 0.001 0.01 0.1 Concentration <Plate Layout Settings> Inhouse fgf23. EC50 = 0.055 1 10 ELISA analysis 1. 2. 3. 4. 3rd Thawing: take from the aliquots Coating: Full-length fgf23 (w/o His tag, (Abcam): 5 µg/mL Coating inhouse fgf23 (uncleaved sumo his tag): 2 µg/mL 1st Ab: Burosumab(AMW1) 9 µg/mL (3 serial dilution down) 2nd Ab: Goat anti-Human (H+L) HRP (1:10,000) IgG std.120509 Inhouse truncated fgf23 1.400 1.600 1.200 1.400 1.000 1.200 0.800 1.000 450 450 IgG std.120509 Commercial full-length fgf23 0.600 0.800 0.400 0.600 0.200 0.400 0.000 0.200 -0.200 1E-005 0.000 0.0001 0.001 0.01 0.1 Concentration <Plate Layout Settings> Commercial fgf23. EC50 = 7000 1 10 1E-005 0.0001 0.001 0.01 0.1 Concentration <Plate Layout Settings> Inhouse fgf23. EC50 = 0.1 1 10