... mobility of tau, with theappearance of an 68-kDa tau species in wild-type and all of the mutant forms of tau except for YallF and Y394F tau (Fig. 3). In contrast to the results obtained with Fyn-SH2, ... mediating interactions between tau and Fyn-SH3, and this furthersuggests that different, and possibly independent, mech-anisms are involved in these interactions of tau with thesame protein. Interactions ... induced theappearance of an 68-kDa band in wild-type, Y18F,Y29F, Y197F and Y310F tau, this band was notapparent on western blots of lysates of Y394F tau(Fig. 2A). The absence of this larger species...