Fig. 4From: Alzheimer’s disease brain contains tau fractions with differential prion-like activitiesAD tau fractions are differentially resistant to proteinase K. AD tau fractions were incubated with various concentrations of proteinase K. The proteolyzed products were analyzed by Western blots developed with a mixture of R134d and 92e (a) and with 77G7 (c). The level of tau was quantified densitometrically and plotted against proteinase K concentration (b, d)Back to article page