Fyn (FYN, SLK, SYN, MGC45350, FYN oncogene related to SRC, FGR, YES, src-like kinase, c-syn protooncogene, tyrosine kinase p59fyn(T), src/yes-related novel gene, OKT3-induced calcium influx regulator, proto-oncogene tyrosine-protein kinase fyn)