Sandwich ELISA analysis of Human Acetylcholinesterase matched pair antibodies Capture: HA725223, Human Acetylcholinesterase Rabbit mAb [PSH17-02] Detector: HA725224, Human Acetylcholinesterasen Rabbit mAb [PSH17-03] Elisa assay was performed by coating wells of a 96-well plate with 50 µl per well of capture antibody (HA725223) diluted in carbonate/bicarbonate buffer, at a concentration of 2 µg/ml overnight at 4℃. Wells of the plate were washed, blocked with 150 µl 0.05% tween-20 1% BSA blocking buffer, and incubated with serial diluted Recombinant Human Acetylcholinesterase protein (HA211178) starting from 25,000 pg/ml to 0 pg/ml and detect antibody (HA725224, Biotin, 0.2 µg/ml) for 1 hour at 30℃ with shaking. Then the plate was washed and incubated with 50 µl per well of SA-HRP for 0.5 hour at 30℃ with shaking. Detection was performed using an Ultra TMB Substrate for 8 minutes at room temperature in the dark. The reaction was stopped with sulfuric acid and absorbances were read on a spectrophotometer at 450 nm.