Figure 2

Measured tau protein concentration, ϕtau-IMR, versus spiked tau protein concentration in PBS solution, ϕtau. The error with each data point is attributed to the duplicated measurements of IMR signals. The solid line represents the proportionality between ϕtau-IMR and ϕtau with the slope of 1.00 for the ϕtau from 1 to 3,000 pg/ml.