| Competitive inhibition of substrate binding and mutagenesis experiments with EGFR / Ufo constructs revealed C terminal tyrosine 821 ( EILpYVNMDEG ) as a docking site for multiple effectors , namely PLCgamma , p 85 proteins , GRB 2 , c src and lck . ^^^ Moreover , our in vivo data indicate that further direct or indirect binding sites for PLCgamma , GRB 2 , c src and lck on the human Ufo receptor may exist . . ^^^ |