P-Tyr References and Link 1) Eckhart W, Hutchinson MA, Hunter T. An activity phosphorylating tyrosine in polyoma T antigen immunoprecipitates. Cell 18, 925-933 (1979) (http://www.ncbi.nlm.nih.gov/pubmed/229973) 2) Witte ON, Dasgupta A, Baltimore D. Abelson murine leukaemia virus protein is phosphorylated in vitro to form phosphotyrosine. Nature 283, 826-831 (1980) (http://www.ncbi.nlm.nih.gov/pubmed/6244493) 3) Hunter T, Sefton BM. Transforming gene product of Rous sarcoma virus phosphorylates tyrosine. Proc Natl Acad Sci USA 77, 1311-1315 (1980) (http://www.ncbi.nlm.nih.gov/pubmed/6246487) 4) Kawahara Y, Takai Y, Minakuchi R, Sano K, Nishizuka Y. Phospholipid turnover as a possible transmembrane signal for protein phosphorylation during human platelet activation by thrombin. Biochem Biophys Res Commun. 97, 309-317 (1980) (http://www.ncbi.nlm.nih.gov/pubmed/6450593)