Fig. 2
Tween-20 increased the recovery of cerebrospinal fluid (CSF) amyloid-β 1–42 (Aβ1–42) from low-retention polypropylene tubes as measured by the AlzBio3 assay. a Aβ1–42 recovery from 0.5-ml of CSF after Tween-20 pretreatment. b Aβ1–42 was not detected in artificial CSF + 0.2% Tween-20 tube wash. c Aβ1–42 recovery from 0.5-ml of CSF without Tween-20 pretreatment. d Aβ1–42 recovery from artificial CSF + 0.2% Tween-20 tube wash. Representative result, n = 1 patient with AD. White bars = untreated CSF, gray bars = CSF pretreated with 0.2% Tween-20, gray bars with dots = wash + 0.2% Tween-20. *Below limit of quantitation